US Patent: 975,285
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| Screw
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Patentee:
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| Peter Lymburner Robertson (exact or similar names) - Hamilton, ON Canada |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Oct. 24, 1907 |
| Granted: |
Nov. 08, 1910 |
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Jeff Joslin
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Description: |
| This is the main patent for the famous (in Canada, at least) Robertson screw. Robertson signed a deal with Fisher Body Co., who reportedly used over 700 Robertson screws in each Ford Model T car. Henry Ford wanted exclusive US rights to the Robertson screw but Robertson refused to sign such a deal, so Ford eventually switched to Phillips screws. Robertson screws were very successful in Canada and remain the dominant screw type there. |
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