Pin box control mechanism
United States Patent 2731197
US Patent References:
/1317604.html
- - 1317604

Listing adding machine
- - 2087182


Inventors:
Parker, Charles A.
Rainey, Clifton K.
Publication Date:
01/17/1956
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Assignee:
BURROUGHS CORP
Primary Class:
235/60TK
Other Classes:
235/130R
International Classes:
G06C7/10; G06C7/00