Robert A. Christiansen

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Salvisa, KY, US

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Patents Grantslast 30 patents

Information Patent Grant
Print head cartridge made with jointless one-piece frame consisting...
- Patent number 6,283,588
- Issue date Sep 4, 2001
- Lexmark International, Inc.
- Fred Young Brandon
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Grant
Print head cartridge and method of making a print head cartridge by...
- Patent number 6,243,117
- Issue date Jun 5, 2001
- Lexmark International, Inc.
- Fred Young Brandon
- B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information Patent Grant
Circuit board with self-supporting connection between sides
- Patent number 4,996,629
- Issue date Feb 26, 1991
- International Business Machines Corporation
- Robert A. Christiansen
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Electrical connection for polymeric conductive material
- Patent number 4,589,584
- Issue date May 20, 1986
- International Business Machines Corporation
- Robert A. Christiansen
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL