GB484821A
(cg-RX-API-DMAC7.html )
US2087182A
(en )
1937-07-13
Listing adding machine
GB295632A
(cg-RX-API-DMAC7.html )
GB474938A
(cg-RX-API-DMAC7.html )
GB417991A
(cg-RX-API-DMAC7.html )
1900-01-01
GB693659A
(cg-RX-API-DMAC7.html )
GB628636A
(cg-RX-API-DMAC7.html )
GB453280A
(cg-RX-API-DMAC7.html )
GB451011A
(cg-RX-API-DMAC7.html )
GB293080A
(cg-RX-API-DMAC7.html )
GB545438A
(cg-RX-API-DMAC7.html )
GB305579A
(cg-RX-API-DMAC7.html )
GB497640A
(cg-RX-API-DMAC7.html )
GB334727A
(cg-RX-API-DMAC7.html )
GB499027A
(cg-RX-API-DMAC7.html )
GB285885A
(cg-RX-API-DMAC7.html )
GB483113A
(cg-RX-API-DMAC7.html )
GB394999A
(cg-RX-API-DMAC7.html )
GB540312A
(cg-RX-API-DMAC7.html )
GB144685A
(en )
1921-04-07
Improvements in printing mechanism for calculating machines
GB608989A
(en )
1948-09-23
Improvements in calculating machines
GB241213A
(cg-RX-API-DMAC7.html )
GB464746A
(cg-RX-API-DMAC7.html )
GB483093A
(cg-RX-API-DMAC7.html )
GB420807A
(cg-RX-API-DMAC7.html )
1900-01-01