US Patent: 921,795
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Mortising-machine
Portable door-mortising machine
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Patentee:
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| George W. Campbell (exact or similar names) - Columbus, OH |
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Patent Dates:
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| Applied: |
Apr. 06, 1908 |
| Granted: |
May 18, 1909 |
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Jeff Joslin
Article in October 1908 Carpentry & Building
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Description: |
| An example has been observed in the wild, labeled with Perfection Mfg Co., this patent date, "others pending".The October 1908 issue of Carpentry & Building had a brief illustrated article describing this invention. See link below the patent image. |
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