William Halopoff

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Cerritos, CA, US

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Patents Grantslast 30 patents

Information Patent Grant
Sectional garage door spring container
- Patent number 4,082,133
- Issue date Apr 4, 1978
- William Halopoff
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES
Information Patent Grant
Attachment for garage door spring
- Patent number 4,076,433
- Issue date Feb 28, 1978
- William Halopoff
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Spring retainer for garage door hardware
- Patent number 4,057,235
- Issue date Nov 8, 1977
- William Halopoff
- E05 - LOCKS KEYS WINDOW OR DOOR FITTINGS SAFES