US Patent: 349,840
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| Drafting Compass
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Patentee:
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| Frederick N. Gardner (exact or similar names) - Hartford, CT |
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Patent Dates:
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| Applied: |
Mar. 24, 1884 |
| Granted: |
Sep. 28, 1886 |
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Patent Pictures:
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Mechanics Magazine, V7, Apr, 1885, pg, vi |
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Joel Havens
"Vintage Machinery" entry for Pratt, Whitney & Co.
American Precision Museum
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Description: |
| Frederick N. Gardner was president of Hartford Tool Co., which was bought by Pratt & Whitney around 1886. |
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