John M. Bertalan

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Tustin, CA, US

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Patents Grantslast 30 patents

Information Patent Grant
Media position sensing system having a plurality of apertures in th...
- Patent number 5,682,039
- Issue date Oct 28, 1997
- CalComp Inc.
- James Lawrence
- G01 - MEASURING TESTING
Information Patent Grant
Pen operability checking system for vector plotters
- Patent number 5,404,425
- Issue date Apr 4, 1995
- CalComp Inc.
- Patrick Nguyen
- G01 - MEASURING TESTING
Information Patent Grant
Pen cleaning system for a pen plotter
- Patent number 5,245,363
- Issue date Sep 14, 1993
- CalComp Inc.
- John M. Bertalan
- G01 - MEASURING TESTING
Information Patent Grant
Completed plot rolling mechanism for a plotter
- Patent number 5,177,497
- Issue date Jan 5, 1993
- Calcomp Inc.
- Jose L. Calderon
- B65 - CONVEYING PACKING STORING HANDLING THIN OR FILAMENTARY MATERIAL