Pocket Watch Database
Patent Archive
#699863
Patent Information
Demagnetizer Watch
Gustav Boettger
May 13, 1902
Patent #699863
Patent Number: | 699863 |
Description: | Demagnetizer Watch |
Inventor(s): | Gustav Boettger |
Patent Date: | May 13, 1902 |
Registration Type: | Patent |
External Research: | https://www.google.c… |
Patent Document: |