US Patent: 2,809,515
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Coolant Testing Instrument
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Patentees:
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Larry A. Bard (exact or similar names) - Birmingham, Oakland County,, MI |
Donald E. Cardoze (exact or similar names) - Roseville, Macomb County, MI |
Lennart M. Hellstrom (exact or similar names) - Detroit, Wayne County, MI |
Manufacturer: |
Not known to have been produced |
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Patent Dates:
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Applied: |
Oct. 20, 1954 |
Granted: |
Oct. 15, 1957 |
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Joel Havens "Vintage Machinery" entry for Michigan Tool Co.
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