US Patent: 2,790,361
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Jack mechanism
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Patentees:
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Walter S. Swanson (exact or similar names) - Rockford, IL |
Fred R. Swanson (exact or similar names) - Rockford, IL |
Herman E. Bargren (exact or similar names) - Rockford, IL |
Manufacturer: |
Not known to have been produced |
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Patent Dates:
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Applied: |
Aug. 14, 1953 |
Granted: |
Apr. 30, 1957 |
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Jeff Joslin
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