Wilfred V. Johnson

Follow

Person

Oxford, MA, US

People

Patents Grantslast 30 patents

Information Patent Grant
Flush mounted fire sprinkler head
- Patent number 4,938,292
- Issue date Jul 3, 1990
- U.S. Fire Control Corporation
- Wilfred V. Johnson
- A62 - LIFE-SAVING FIRE-FIGHTING
Information Patent Grant
Automatic on-off sprinkler head
- Patent number 4,706,758
- Issue date Nov 17, 1987
- U.S. Fire Control Corporation
- Wilfred V. Johnson
- A62 - LIFE-SAVING FIRE-FIGHTING
Information Patent Grant
Pipe joint
- Patent number 4,491,352
- Issue date Jan 1, 1985
- U.S. Fire Control Corporation
- Frank G. Logan
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Fire sprinkler apparatus
- Patent number 4,465,141
- Issue date Aug 14, 1984
- U.S. Fire Control Corporation
- Wilfred V. Johnson
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Automatic on-off fire sprinkler head
- Patent number 4,359,098
- Issue date Nov 16, 1982
- U.S. Fire Control Corporation
- Wilfred V. Johnson
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Energy storage
- Patent number 4,337,622
- Issue date Jul 6, 1982
- Wilfred V. Johnson
- F24 - HEATING RANGES VENTILATING
Information Patent Grant
Delayed closing fire sprinkler heads
- Patent number 3,991,829
- Issue date Nov 16, 1976
- U.S. Fire Control Corporation
- Wilfred V. Johnson
- A62 - LIFE-SAVING FIRE-FIGHTING