Title:
Topographer's rule
United States Patent 1583138


Inventors:
Mell, Garnett Fred
Application Number:
US738325A
Publication Date:
05/04/1926
Filing Date:
02/06/1925
Assignee:
Mell, Garnett Fred
Primary Class:
Other Classes:
33/566, D10/62
International Classes:
G01C15/00
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