Pocket Watch Database
Patent Archive
#2679135
Patent Information
Chronograph
Wilhelm Julius Hannhart
May 25, 1954
Patent #2679135
Patent Number: | 2679135 |
Description: | Chronograph |
Inventor(s): | Wilhelm Julius Hannhart |
Patent Date: | May 25, 1954 |
Registration Type: | Patent |
External Research: | https://www.google.c… |
Patent Document: |