Monroe patents list
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Link!Filing dateInventor
US Patent #
Serial #Issue dateTitleNotes
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View1873-09-08Frank S Baldwin 159,2441875-02-02Calculating-machineFirst known Baldwin patent
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View1874-04-01Frank S Baldwin 153,5221874-07-28Improvement in adding-machines
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View1901-11-26Frank S Baldwin 706,3751902-08-05Calculating-machine
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View1907-01-24Frank S Baldwin 890,8881908-06-16Calculating and recording machine
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View1911-06-29George C Chase 1,011,1561911-12-12Registering mechanism for calculating-machinesNot assigned
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View1912-06-15Frank S Baldwin 1,080,245703,901 1913-12-02Calculating-machineFirst known Monroe company patent
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View1914-06-04Jay R Monroe, Edgar E Phinney 1,180,410843,030 1916-04-25Carriage-shifting means for calculating-machines
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View1914-08-03Edgar E Phinney 1,215,186854,708 1917-02-06Carrying mechanism for calculating-machines
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View1914-08-03Jay R Monroe 1,306,606854,687 1919-06-10Calculating-machine
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View1914-09-24Frank S Baldwin 1,275,119863,316 1918-08-06Zero-setting mechanism
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View1914-09-25Jay R Monroe 1,208,190863,513 1916-12-12Carriage-lock for calculating-machines
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View1914-10-27Edgar E Phinney 1,208,366868,869 1916-12-12Spring-brake for gears
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View1914-12-04Edgar E Phinney 1,197,538875,493 1916-09-05Carrying mechanism for calculating-machines
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View1914-04-20Frank S Baldwin RE138411914-12-08Calculating machineBaldwin's last Monroe patent
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View1915-03-20George C Chase 1,329,2621920-01-17Calculating machineNot assigned
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View1915-07-22Edgar E Phinney 1,220,5451917-03-27Calculating-machine
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View1915-08-27Edgar E Phinney 1,215,1871917-02-06
Means to prevent reverse movement in calculating-machines
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View1915-08-27Edgar E Phinney 1,272,08347,844 1918-07-09Carrying mechanism for calculating-machines
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View1916-07-20Edgar E Phinney 1,253,8791918-01-15Calculating-machine
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View1917-01-13Edgar E Phinney 1,330,6511920-02-10Calculating-machine
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View1917-03-03Edgar E Phinney 1,330,6521920-02-10Carriage shifting means for calculating machines
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View1917-03-08Edgar E Phinney 1,330,6531920-02-10Zero setting mechanism for calculating machines
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View1917-03-08Edgar E Phinney 1,354,839153,365 1920-10-05Keyboard-clearing means for registers
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View1917-11-08George C Chase 1,330,6821920-02-10RegisterAssigned to Chase Adding Machine Corporation
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View1917-11-17George C Chase 1,340,3741920-05-18Adding-machineAssigned to Chase Adding Machine Corporation
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View1918-06-14George C Chase 1,358,0581920-11-09Zero setting means for registersAssigned to Chase Adding Machine Corporation
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View1918-10-16Edgar E Phinney 1,354,8401920-10-05Calculating-machine
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View1918-10-16Edgar E Phinney 1,354,8411920-10-05Carrying mechanism for calculating-machines
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View1918-12-26Edgar E Phinney 1,396,6621921-11-08Calculating-machine
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View1918-12-30George C Chase 1,354,884268,920 1920-10-05Adding-machineAssigned to Chase Adding Machine Corporation
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View1919-03-15James Clarence Burne 1,358,517282,813 1920-11-09Attachment to adding-machines
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View1919-04-08Edgar E Phinney 1,335,349288,522 1920-03-30
Automatic carriage-raising means for calculating-machines
Illustrations show G model
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View1919-06-03Edgar E Phinney 1,432,256301,477 1922-10-17Calculating machineA more different machine, with sliders
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View1919-07-23Edgar E Phinney 1,349,6281920-08-17Over rotation check for calculating machine gearsUsed in K model
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View1920-02-07Edgar E Phinney 1,384,634356,882 1921-07-12Carriage-lock for calculating-machinesUsed in K model
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View1920-02-25Edgar E Phinney 1,384,632361,178 1921-07-12Key-lock for calculating machinesUsed in K model
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View1920-02-28Edgar E Phinney 1,384,6331921-07-12Reverse-operation check for registersUsed in K model
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View1920-03-08Edgar E Phinney 1,432,616364,042 1922-10-17Keyboard-clearing means for calculating machinesUsed in K model
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View1920-03-15Edgar E Phinney 1,396,663365,971 1921-11-08Crank-handle latchUsed in K model
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View1920-03-15Edgar E Phinney 1,399,6521921-12-06Setting-up means for calculating machinesUsed in K model
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View1920-04-14Edwin F Britten Jr 1,384,592373,835 1921-07-12Shock-absorber for calculating-machine carriagesUsed in K model
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View1920-04-14Edwin F Britten Jr 1,462,058373,834 1923-07-17Carry mechanism for registersUsed in K model
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View1920-08-03Edwin F Britten Jr 1,462,0591923-07-17
Automatic carriage-raising means for calculating-machines
Used in K model
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View1920-10-23Nelson White 1,396,612419,026 1921-11-08Zero-setting mechanismUsed in K model
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View1920-10-23Nelson White 1,437,286419,027 1922-11-28Key stopUsed in K model
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View1920-11-23Edwin F Britten Jr 1,462,0601923-07-17Carry-set mechanism for calculating machinesUsed in K model
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View1920-11-23Edwin F Britten Jr 1,462,061497,864 1923-07-17Overthrow check for calculating machineUsed in K model
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View1920-11-23Edwin F Britten Jr 1,474,230426,043 1923-11-13Calculating-machineK
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View1922-01-16George C Chase 1,544,806529,426 1925-07-07Full-cycle stop for calculating machinesK? Chase's first patent after joining Monroe
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View1922-05-12George C Chase 1,468,992560,359 1923-09-25Calculating machineFractions
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View1922-05-12George C Chase 1,474,238560,360 1923-11-13Selector mechanism for calculating machinesKeys for fractions
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View1922-11-21George C Chase 1,566,650602,366 1925-12-22Operating means for calculatorsKA model
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View1923-09-11George C Chase 1,504,741662,090 1924-08-12Counting-wheel carry mechanism
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View1925-09-22Edwin F Britten Jr 1,750,56557,868 1930-03-11Zero-key mechanism for key-set registers
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View1925-11-07George C Chase 1,664,66167,676 1928-04-03Full-cycle positioning mechanism
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View1926-01-07George C Chase 1,888,16179,811 1932-11-15Automatic control for calculating machines
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View1926-03-15George C Chase 1,685,07494,968 1928-09-18Multiplier mechanism for calculating machines
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View1926-03-15George C Chase RE174661929-10-22Multiplier mechanism for calculating machines
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View1927-01-05George C Chase 1,829,210159,155 1931-10-27Automatic carriage shifting mechanism for calculators
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View1927-08-17Hugo E Enders 1,892,614213,570 1932-12-27Automatic multiplication mechanism for calculators
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View1927-08-17Hugo E Enders 1,898,819495,916 1933-02-21Attachment for calculating machines
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View1927-08-17George C Chase 2,250,403213,637 1941-07-22Division stop mechanism for calculators
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View1927-10-03George C Chase 1,773,025223,708 1930-08-12Carriage-shift control for calculating machines
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View1927-10-15George C Chase 1,773,026226,418 1930-08-12Carriage-shifting mechanism for calculators
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View1928-02-23Loring Pickering Crosman 1,713,690256,272 1929-05-21Spring testing and assorting machine
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View1929-02-02Edwin F Britten Jr 1,849,448337,073 1929-02-02Registering mechanism
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View1929-02-15George C Chase 1,878,757340,187 1932-09-20Decimal equivalent selector mechanism
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View1929-02-18George C Chase 1,859,195340,875 1932-05-19Variable speed transmission for registers
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View1929-02-27Fred Masch 1,837,785343,209 1931-12-22Switch mechanism for calculating machines
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View1929-02-28George C Chase 1,847,9261932-03-01Method of forming internal and crown gears
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View1929-03-13George C Chase 1,827,837346,686 1931-10-20Calculating machine
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View1929-03-23Edwin F Britten Jr 1,793,155349,449 1931-02-17Calculating machine
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View1929-04-01Edwin F Britten Jr, Lee R Brown 1,817,916351,541 1931-08-11Attachment for calculating machines
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View1929-04-05Lee R Brown 1,810,638352,718 1931-06-16Attachment for calculating machines
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View1929-04-06George C Chase 1,794,514353,107 1931-03-03Driving mechanism for calculating machines
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View1929-04-09Austin A Overbury 1,783,446353,725 1930-12-02Attachment for calculating machines
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View1929-04-10Loring Pickering Crosman 1,781,320354,082 1930-11-11Zero-setting device
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View1929-07-17Adolphus S Dennis 1,803,464378,942 1931-05-05Attachment for calculating machines
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View1929-07-22Edwin F Britten Jr 1,860,490379,948 1932-05-31Attachment for calculating machines
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View1929-08-01Edward C Walter 1,883,138382,639 1932-10-18Desk stand
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View1929-08-01Lee R Brown 1,900,042382,792 1933-03-07Calculating machine
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View1929-08-08Hugo E Enders 1,788,2841931-01-06Register
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View1929-08-12George C Chase 1,773,027385,161 1930-08-12Calculating machine
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View1929-08-15Edwin F Britten Jr 1,807,192386,050 1931-05-26Attachment for calculating machines
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View1929-08-15Hugo E Enders 1,858,295386,042 1932-05-17Calculating machine
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View1929-09-05Austin A Overbury 1,792,391390,598 1931-02-10Register
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View1929-09-12George C Chase 1,818,790392,189 1931-08-11Calculating machine
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View1929-09-21Edwin F Britten Jr 1,849,169394,256 1932-03-15Calculating machine
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View1929-10-03George C Chase 1,842,584398,205 1932-01-26Calculating machine
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View1929-11-19Loring Pickering Crosman 1,828,176408,238 1931-10-20Spring testing machine
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View1929-11-20George C Chase, Lee R Brown 1,834,121408,545 1931-12-01Calculating machine
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View1929-12-14George C Chase, Lee R Brown 1,857,356414,142 1932-05-10Calculating and listing machine
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View1929-12-23Edwin F Britten Jr 1,801,902415,976 1931-04-21Calculating machineActually about a carriage shifting mechanism
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View1930-01-03George C Chase 1,898,996418,254 1933-02-28Calculating machineA machine with sliders
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View1930-01-04Theodore G Falstrom1,801,4901931-03-21Means for setting dies in presses
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View1930-02-26John Bricken 1,801,484431,549 1931-04-21Keyboard for calculating machinesKeycaps are now cylinders, as in L model
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View1930-03-25Frank M Smith1,783,1721930-11-25Attachment for calculating machines
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View1930-05-19George C Chase 1,841,170453,747 1932-01-12Calculating machineActually about fractional keys
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View1930-05-29George C Chase 1,845,863457,243 1932-02-16Calculating machine
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