Ronald J. Johnsen

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Cary, NC, US

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Patents Grantslast 30 patents

Information Patent Grant
Variable frequency buzzer assembly
- Patent number 6,215,391
- Issue date Apr 10, 2001
- Ericsson Inc.
- Matthew J. Murray
- G10 - MUSICAL INSTRUMENTS ACOUSTICS
Information Patent Grant
Ink jet system with serial data printheads
- Patent number 5,825,375
- Issue date Oct 20, 1998
- Diagraph Corporation
- Jimmy L. Droit
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Ink jet system with serial data printheads
- Patent number 5,606,349
- Issue date Feb 25, 1997
- Diagraph Corporation
- Jimmy L. Droit
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Continuous laser printer for printing over page boundaries
- Patent number 5,115,493
- Issue date May 19, 1992
- Ivan M. Jeanblanc
- G06 - COMPUTING CALCULATING COUNTING