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Patent Archive
#205808
Patent Information
Electric Gravity Escape For Pendulum
John F. Pratt
July 9, 1878
Patent #205808
| Patent Number: | 205808 |
| Description: | Electric Gravity Escape For Pendulum |
| Inventor(s): | John F. Pratt |
| Patent Date: | Jul 9, 1878 |
| Registration Type: | Patent |
| External Research: | https://www.google.c… |
| Patent Document: |
