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| File information | |
| Filename: | us0d0005738-001.jpg |
| Keywords: | Bakewell & Christy / Wilkins Township / Pittsburg / Pennsylvania / Allegheny / A. S. Nicholson / James I. Kay |
| Inventor's Name: | Charles Ballinger |
| Patent Date: | April 2, 1872 |
| Pattern Name/Number: | Unknown |
| Original Manufacturer: | McKee Brothers |
| Date added: | Apr 21, 2019 |