US Patent: 1,019,400
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Universal Test Indicator
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Patentees:
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Louis W. Zuegner (exact or similar names) - Chicago, IL |
Vernas Langsdon (exact or similar names) - Pasadena, CA |
Manufacturer: |
Not known to have been produced |
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Patent Dates:
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Applied: |
Feb. 21, 1908 |
Granted: |
Mar. 05, 1912 |
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Joel Havens
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Description: |
R. J. Jacker - patent attorney |
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