Pocket Watch Database
Patent Archive
#455787
Patent Information
Timepiece Balance Wheel For
Hugo Bilgram
July 14, 1891
Patent #455787
Patent Number: | 455787 |
Description: | Timepiece Balance Wheel For |
Inventor(s): | Hugo Bilgram |
Patent Date: | Jul 14, 1891 |
Registration Type: | Patent |
External Research: | https://www.google.c… |
Patent Document: |