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3738037
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Information
Patent Grant
3738037
References
Source
Patent Number
3,738,037
Date Filed
Not available
Date Issued
Tuesday, June 12, 1973
50 years ago
CPC
B43K29/093 - with calculators
G06G1/0068 - for conversion from one unit system to another
G06G1/085 - borne by a cylinder
G09F2023/0016 - on pens
Y10S40/905 - Pen and pencil
US Classifications
040 - Card, picture, or sign exhibiting
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