NATIONAL COMPUTER SYSTEMS, INC.
Patent Owner
Stats
- 4 US PATENTS IN FORCE
- 0 US APPLICATIONS PENDING
- Oct 01, 2002 most recent publication
Details
- 4 Issued Patents
- 0 Issued in last 3 years
- 0 Published in last 3 years
- 852 Total Citation Count
- Nov 14, 1975 Earliest Filing
- 24 Expired/Abandoned/Withdrawn Patents
Patent Activity in the Last 10 Years
Technologies
Intl Class
Technology
Matters
Rank in Class
Top Patents (by citation)
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Recent Publications
- No Recent Publications to Display
Recent Patents
Patent #
Title
Filing Date
Issue Date
Intl Class
6459509 Optical scanning device having a calibrated pixel output and a method for calibrating such a deviceJun 16, 00Oct 01, 02[H04N]
5711673 Method for interpreting a plurality of response marks on a scannable surfaceFeb 24, 95Jan 27, 98[G06K]
5184003 Scannable form having a control mark column with encoded data marksJan 24, 92Feb 02, 93[G09B, G06K]
Expired/Abandoned/Withdrawn Patents
Patent #
Title
Status
Filing Date
Issue/Pub Date
Intl Class
5103490 Method and apparatus for storing and merging multiple optically scanned imagesExpiredJun 13, 90Apr 07, 92[G06K]
4937439 Method and system for creating and scanning a customized survey formExpiredMay 13, 88Jun 26, 90[G09B, G06F, G06K]
4857715 Overprint registration system for printing a customized survey form and scannable form thereforExpiredApr 01, 88Aug 15, 89[B06K]
4300791 Optically scannable answer sheet booklet with sequence bars printed thereon and method of producing sameExpiredMar 27, 80Nov 17, 81[B42F, B65H]
4268746 Document feed jam detector for a document reading apparatusExpiredOct 25, 79May 19, 81[B65H]
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