US1016276A
(en )
1912-02-06
Adding and listing machine.
US2745601A
(en )
1956-05-15
Key-responsive calculating machine
GB838252A
(enrdf_load_stackoverflow )
US2247938A
(en )
1941-07-01
Calculating machine
US2087182A
(en )
1937-07-13
Listing adding machine
US1294507A
(en )
1919-02-18
Registering-machine.
US2756926A
(en )
1956-07-31
Dodsworth
US2364769A
(en )
1944-12-12
Accounting machine
US2577395A
(en )
1951-12-04
Autographic eegister
US3072329A
(en )
1963-01-08
Control for motor operated business machines
US1817883A
(en )
1931-08-04
Cash register
US2666574A
(en )
1954-01-19
Calculating machine having true
US1181238A
(en )
1916-05-02
Cash-register.
US3194496A
(en )
1965-07-13
Pin carriage to clutch interlock mechanism in a ten-key adding and subtracting machine
GB709181A
(enrdf_load_stackoverflow )
US1956569A
(en )
1934-05-01
Adding and listing machine
US2166067A
(en )
1939-07-11
Transfer mechanism
GB191026858A
(en )
1911-11-20
Improvements in Typographical Adding and like Calculating Machines.
US933600A
(en )
1909-09-07
Calculating attachment for type-writing machines.
US3331556A
(en )
1967-07-18
Power driving device for a calculating machine
US1013211A
(en )
1912-01-02
Combination type-writing and adding machine.
US3003686A
(en )
1961-10-10
Clear sign printing means for an accounting machine having true negative totalization
US1278458A
(en )
1918-09-10
Combined type-writing and computing machine.
GB648390A
(enrdf_load_stackoverflow )
GB190930426A
(en )
1911-01-30
Improvements in the Column Printing and Denomination Selecting Arrangements of Computing Attachments for Typewriters.