Robert M. Callahan

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Woodstock, NY, US

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Patents Grantslast 30 patents

Information Patent Grant
Application exit for potentially pickable primitives in a graphics...
- Patent number 5,027,291
- Issue date Jun 25, 1991
- International Business Machines Corporation
- Robert M. Callahan
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Multistage clipping method
- Patent number 5,012,433
- Issue date Apr 30, 1991
- International Business Machines Corporation
- Robert M. Callahan
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Interactive computer graphics display system processing method for...
- Patent number 4,982,345
- Issue date Jan 1, 1991
- International Business Machines Corporation
- Robert M. Callahan
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Picking in a graphics system
- Patent number 4,847,605
- Issue date Jul 11, 1989
- International Business Machines Corporation
- Robert M. Callahan
- G06 - COMPUTING CALCULATING COUNTING