GB431623A
(enrdf_load_stackoverflow )
US2485695A
(en )
1949-10-25
Key interlock
US2992773A
(en )
1961-07-18
Multiplication mechanism for adding machines
US2666573A
(en )
1954-01-19
Differential latch mechanism
US3084855A
(en )
1963-04-09
Ten-key adding machine fo r non-uniform
GB190930426A
(en )
1911-01-30
Improvements in the Column Printing and Denomination Selecting Arrangements of Computing Attachments for Typewriters.
US3072329A
(en )
1963-01-08
Control for motor operated business machines
US3194496A
(en )
1965-07-13
Pin carriage to clutch interlock mechanism in a ten-key adding and subtracting machine
US3331556A
(en )
1967-07-18
Power driving device for a calculating machine
GB852822A
(enrdf_load_stackoverflow )
US3040977A
(en )
1962-06-26
Function control mechanism for manual adding machines
US1274729A
(en )
1918-08-06
Total-proof device for adding mechanism.
US2055623A
(en )
1936-09-29
Calculating machine
US1274730A
(en )
1918-08-06
Lock-actuator for total-proof devices on computing-machines.
US646599A
(en )
1900-04-03
Adding-machine.
GB191219273A
(en )
1913-03-13
Improvements in the Keyboards and Connecting Members of Calculating Machines.
GB431627A
(enrdf_load_stackoverflow )
GB736097A
(enrdf_load_stackoverflow )
GB537502A
(enrdf_load_stackoverflow )
GB434369A
(enrdf_load_stackoverflow )
GB732760A
(enrdf_load_stackoverflow )
GB787507A
(enrdf_load_stackoverflow )
GB438369A
(enrdf_load_stackoverflow )
GB191200001A
(en )
1912-08-01
Improvements in or relating to Adding and Listing Machines.
GB190922862A
(en )
1909-12-10
Improvements in Apparatus for Adding or Calculating.