Nicholas G. Polydoris

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Wilmette, IL, US

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Patents Grantslast 30 patents

Information Patent Grant
Engine operating time hour meter
- Patent number D332923
- Issue date Feb 2, 1993
- ENM Company
- Nicholas G. Polydoris
- D10 - Measuring, testing, or signalling instruments
Information Patent Grant
Engine operating time measuring apparatus
- Patent number 5,121,368
- Issue date Jun 9, 1992
- ENM Company
- Nicholas G. Polydoris
- G06 - COMPUTING CALCULATING COUNTING