GB955536A
(cg-RX-API-DMAC7.html )
US2261341A
(en )
1941-11-04
Adding and listing machine
US1915296A
(en )
1933-06-27
crosman
GB497640A
(cg-RX-API-DMAC7.html )
US3171594A
(en )
1965-03-02
And similar machines
US2577395A
(en )
1951-12-04
Autographic eegister
GB241213A
(cg-RX-API-DMAC7.html )
GB272467A
(cg-RX-API-DMAC7.html )
GB607744A
(cg-RX-API-DMAC7.html )
GB809523A
(en )
1959-02-25
Ten key adding and subtracting machine
GB822428A
(cg-RX-API-DMAC7.html )
GB474938A
(cg-RX-API-DMAC7.html )
GB540312A
(cg-RX-API-DMAC7.html )
GB487494A
(cg-RX-API-DMAC7.html )
GB508141A
(cg-RX-API-DMAC7.html )
GB285885A
(cg-RX-API-DMAC7.html )
GB483113A
(cg-RX-API-DMAC7.html )
GB297717A
(cg-RX-API-DMAC7.html )
GB629975A
(cg-RX-API-DMAC7.html )
GB499027A
(cg-RX-API-DMAC7.html )
GB420807A
(cg-RX-API-DMAC7.html )
1900-01-01
GB611091A
(cg-RX-API-DMAC7.html )
GB628636A
(cg-RX-API-DMAC7.html )
GB506500A
(cg-RX-API-DMAC7.html )
GB275968A
(cg-RX-API-DMAC7.html )