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Donivan L. Hall
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Toledo, OH, US
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Patents Grants
last 30 patents
Information
Patent Grant
Vehicle weighing in motion apparatus and method
Patent number
5,002,141
Issue date
Mar 26, 1991
Toledo Scale Corporation
Richard C. Loshbough
G01 - MEASURING TESTING
Information
Patent Grant
Splash-resistant scale
Patent number
4,253,534
Issue date
Mar 3, 1981
Reliance Electric Company
Donivan L. Hall
G01 - MEASURING TESTING
Information
Patent Grant
Digital scale with antifraud features
Patent number
4,159,521
Issue date
Jun 26, 1979
Reliance Electric Company
Donivan L. Hall
G06 - COMPUTING CALCULATING COUNTING
Information
Patent Grant
Digital scale with means to shift displayed weight to show fraction...
Patent number
4,004,139
Issue date
Jan 18, 1977
Reliance Electric Company
Donivan L. Hall
G01 - MEASURING TESTING