John E. Ahmann

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Napa, CA, US

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Patents Grantslast 30 patents

Information Patent Grant
Ballot box
- Patent number 4,981,259
- Issue date Jan 1, 1991
- John E. Ahmann
- G07 - CHECKING-DEVICES
Information Patent Grant
Dual voting booth package
- Patent number 4,854,652
- Issue date Aug 8, 1989
- John E. Ahmann
- A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
Information Patent Grant
Portable voting booth adapter
- Patent number 4,712,757
- Issue date Dec 15, 1987
- John E. Ahmann
- G07 - CHECKING-DEVICES
Information Patent Grant
Punching stylus for handicapped users
- Patent number 4,642,450
- Issue date Feb 10, 1987
- Election Supplies Limited
- John E. Ahmann
- G07 - CHECKING-DEVICES
Information Patent Grant
Compact portable voting booth
- Patent number 4,569,564
- Issue date Feb 11, 1986
- John E. Ahmann
- A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
Information Patent Grant
Portable voting booth
- Patent number 4,445,731
- Issue date May 1, 1984
- John E. Ahmann
- A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...
Information Patent Grant
Punch frame for data registering device
- Patent number 4,297,566
- Issue date Oct 27, 1981
- John E. Ahmann
- G07 - CHECKING-DEVICES
Information Patent Grant
Stylus for tabulating device
- Patent number 4,258,249
- Issue date Mar 24, 1981
- John E. Ahmann
- G06 - COMPUTING CALCULATING COUNTING