Allan C. Hoffman

Person

Riverside, CA, US

People

Patents Grantslast 30 patents

Information Patent Grant
Method and apparatus for fabricating a seamless hollow rubber core...
- Patent number 5,062,912
- Issue date Nov 5, 1991
- Allan C. Hoffman
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Method of making tennis ball with a single core and cover bonding cure
- Patent number 4,853,056
- Issue date Aug 1, 1989
- Allan C. Hoffman
- A63 - SPORTS GAMES AMUSEMENTS
Information Patent Grant
Method of making a pressurized ball
- Patent number 4,765,853
- Issue date Aug 23, 1988
- Allan C. Hoffman
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Normally closed duckbill valve and method of manufacture
- Patent number 4,524,805
- Issue date Jun 25, 1985
- Allan C. Hoffman
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Self-limiting pump
- Patent number 4,428,478
- Issue date Jan 31, 1984
- Allan C. Hoffman
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information Patent Grant
Tennis ball
- Patent number 4,327,912
- Issue date May 4, 1982
- Allan C. Hoffman
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Game ball check valve
- Patent number 4,240,630
- Issue date Dec 23, 1980
- Allan C. Hoffman
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Game ball repressurizing method
- Patent number 4,012,041
- Issue date Mar 15, 1977
- Allan C. Hoffman
- A63 - SPORTS GAMES AMUSEMENTS

Allan C. Hoffman

Person

Patents Grantslast 30 patents

Method and apparatus for fabricating a seamless hollow rubber core...

Method of making tennis ball with a single core and cover bonding cure

Method of making a pressurized ball

Normally closed duckbill valve and method of manufacture

Self-limiting pump

Tennis ball

Game ball check valve

Game ball repressurizing method