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| File information | |
| Filename: | us0d0007758-001.jpg |
| Keywords: | Pittsburgh / Pennsylvania / Allegheny / Joseph K. Brown / Andrew Humbert |
| Inventor's Name: | Lorenz Stoehr |
| Patent Date: | September 15, 1874 |
| Pattern Name/Number: | Block & Honeycomb |
| Original Manufacturer: | McKee & Brothers |
| Date added: | Apr 21, 2019 |