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Patent Archive
#1138991
Patent Information
Electrical Apparatus & Circuit
Alfred L. Sohm
May 11, 1915
Patent #1138991
| Patent Number: | 1138991 |
| Description: | Electrical Apparatus & Circuit |
| Inventor(s): | Alfred L. Sohm |
| Assignee: | Sohm Electric Signal Record Co |
| Patent Date: | May 11, 1915 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
