Darwin R. Grahl

Follow

Person

Newark, NY, US

People

Patents Grantslast 30 patents

Information Patent Grant
Discharge line filter-dryer
- Patent number 4,255,940
- Issue date Mar 17, 1981
- Parker-Hannifin Corporation
- Darwin R. Grahl
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Grant
Tube coupling
- Patent number 4,124,235
- Issue date Nov 7, 1978
- Parker-Hannifin Corporation
- Darwin R. Grahl
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Control valve
- Patent number 4,087,986
- Issue date May 9, 1978
- Parker-Hannifin Corporation
- Darwin R. Grahl
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Grant
Tube coupling
- Patent number 4,059,297
- Issue date Nov 22, 1977
- Parker-Hannifin Corporation
- Darwin R. Grahl
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Valve assembly for panel mounting
- Patent number 4,026,320
- Issue date May 31, 1977
- Parker-Hannifin Corporation
- Darwin R. Grahl
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...
Information Patent Grant
Method and apparatus for charging air conditioners with refrigerant...
- Patent number 3,937,029
- Issue date Feb 10, 1976
- Parker-Hannifin Corporation
- Darwin R. Grahl
- F25 - REFRIGERATION OR COOLING COMBINED HEATING AND REFRIGERATION SYSTEMS HEA...