Actuating mechanism for ten key adding machines

Adapter unit for accounting machine

Adding attachment for typewriting machines

Adding machine

Adding, subtracting and totaling calculator

Adjustable keyboard

Advanced gestational wheel calculator

Aircraft lateral distance calculator

Analog storage device

Analog-to-digital encoder

Apparatus for converting digital signals into analogical...

Apparatus for recording sales and the like

Apparatus for retaining a machine member in an active...

Astrological comparison wheel

Auditing machine

Auditing machine

Automatic accumulating means for accounting machines

Automatic repeat mechanism

Auxiliary keyboard apparatus

Balance printer selecting device