Pocket Watch Database
Patent Archive
#912230
Patent Information
Recorder Work Man Autograph
Frank H. Cottrill
Alfred Leihammer
February 9, 1909
Patent #912230
| Patent Number: | 912230 |
| Description: | Recorder Work Man Autograph |
| Inventor(s): |
Frank H. Cottrill Alfred Leihammer |
| Patent Date: | Feb 9, 1909 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
