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US2636401A
|
|
Automatic change-speed transmission
|
|
US2328272A
|
|
Cash register
|
|
US1968387A
|
|
Power mechanism
|
|
US1999727A
|
|
Calculating machine
|
|
US1971680A
|
|
Motor mechanism
|
|
US1348942A
|
|
Dating mechanism for calculating and like machines
|
|
US1742535A
|
|
Word-printing mechanism
|
|
US1742534A
|
|
Duplicate-printing mechanism for calculating and like machines
|
|
US1742530A
|
|
Nonprint mechanism for calculating and like machines
|
|
US1742522A
|
|
Adding and recording machine
|
|
US1742521A
|
|
Adding and recording machine
|
|
US1742523A
|
|
Printing mechanism
|
|
US1160071A
|
|
Calculating-machine.
|
|
CA230488A
|
|
Calculating machine
|
|
CA230492A
|
|
Vertical ruling mechanism for calculating machines
|
|
CA259506A
|
|
Calculating machine
|
|
CA230491A
|
|
Dating mechanism for calculating machines
|
|
CA230493A
|
|
Horizontal ruling mechanism for calculating machines
|
|
CA230489A
|
|
Paper supporting mechanism for recording machines
|
|
CA230490A
|
|
Key interlocking mechanism for calculating machines
|
