Pocket Watch Database
Patent Archive
#2259309
Patent Information
Cmetric Instrument
Frank H. Hibbard
October 14, 1941
Patent #2259309
| Patent Number: | 2259309 |
| Description: | Cmetric Instrument |
| Inventor(s): | Frank H. Hibbard |
| Assignee: | Bell Telephone Laboratories In |
| Patent Date: | Oct 14, 1941 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
