John N. Grundy Jr.

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Gilbert, AZ, US

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Patents Grantslast 30 patents

Information Patent Grant
Method for interpreting a plurality of response marks on a scannabl...
- Patent number 5,711,673
- Issue date Jan 27, 1998
- National Computer Systems
- John N. Grundy
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Adjustable read level threshold for optical mark scanning
- Patent number 5,420,407
- Issue date May 30, 1995
- National Computer Systems, Inc.
- John N. Grundy
- G06 - COMPUTING CALCULATING COUNTING