GB509444A
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GB191403084A
(en )
1915-02-04
Improvements in Adding Machines.
GB191219273A
(en )
1913-03-13
Improvements in the Keyboards and Connecting Members of Calculating Machines.
US1274731A
(en )
1918-08-06
Total-proof lock for computing type-writers.
GB191115177A
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GB416498A
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GB292619A
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GB528567A
(cg-RX-API-DMAC10.html )
GB608988A
(cg-RX-API-DMAC10.html )
US1278458A
(en )
1918-09-10
Combined type-writing and computing machine.
GB427722A
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GB268839A
(cg-RX-API-DMAC10.html )
GB420807A
(cg-RX-API-DMAC10.html )
1900-01-01
GB783849A
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GB389630A
(cg-RX-API-DMAC10.html )
1900-01-01
GB474938A
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GB298114A
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GB417991A
(cg-RX-API-DMAC10.html )
1900-01-01
GB481127A
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GB438369A
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GB445540A
(cg-RX-API-DMAC10.html )
GB431623A
(cg-RX-API-DMAC10.html )
GB191129373A
(en )
1912-11-28
Improvements in or relating to Adding and Listing or like Machines.
GB340256A
(cg-RX-API-DMAC10.html )
GB259267A
(cg-RX-API-DMAC10.html )