John R. Yonovich

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Shortsville, NY, US

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Patents Grantslast 30 patents

Information Patent Grant
Spring system for double-hung window sash
- Patent number 4,685,175
- Issue date Aug 11, 1987
- Caldwell Manufacturing Company
- John R. Yonovich
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
Information Patent Grant
Vibration dampener for coil tension window balance spring
- Patent number 4,540,070
- Issue date Sep 10, 1985
- Caldwell Manufacturing Co., Inc.
- John R. Yonovich
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES