Gerry H. Ehrhardt

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Des Moines, IA, US

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Patents Grantslast 30 patents

Information Patent Grant
Chemical carbonless copy paper and transfer medium therefor
- Patent number 4,347,282
- Issue date Aug 31, 1982
- Frye Copysystems, Inc.
- Gerry H. Ehrhardt
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Grant
Carbonless copy paper system
- Patent number 4,343,494
- Issue date Aug 10, 1982
- Frye Copysystems, Inc.
- Gerry H. Ehrhardt
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Grant
Chemical carbonless copy paper and image receptor medium therefor
- Patent number 4,327,939
- Issue date May 4, 1982
- Frye Copysystems, Inc.
- Gerry H. Ehrhardt
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Grant
Water insensitive image receptor coating
- Patent number 4,226,442
- Issue date Oct 7, 1980
- Frye Copysystems, Inc.
- Gene D. Carlson
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Grant
Flow agent for ink systems
- Patent number 3,941,608
- Issue date Mar 2, 1976
- Frye Copysystems, Inc.
- Gerry H. Ehrhardt
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...