National Computer Systems, Inc.
🏢 View company profile →42Patents
0Active
42Granted
38Portfolio score
Filing activity: Jul 3, 1972 → Jun 16, 2000
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5262943A | System and process for information management and reporting | Emerging Cross-Sectional Technologies | 177 | Expired |
| US5134669A | Image processing system for documentary data | Physics | 167 | Expired |
| US4937439A | Method and system for creating and scanning a customized survey form | Physics | 120 | Expired |
| US5103490A | Method and apparatus for storing and merging multiple optically scanned images | Electricity | 113 | Expired |
| US5086215A | Method and apparatus for discriminating or locating bar codes for an optical mark reader | Physics | 95 | Expired |
| US5466159A | Collaborative and quality control scoring system | Emerging Cross-Sectional Technologies | 81 | Expired |
| US5001330A | Optically scanned document with fail-safe marking | Physics | 76 | Expired |
| US5321611A | Multiple test scoring system | Physics | 74 | Expired |
| US6459509B1 | Optical scanning device having a calibrated pixel output and a method for calibrating such a device | Electricity | 67 | Expired |
| US5437554A | System for providing performance feedback to test resolvers | Emerging Cross-Sectional Technologies | 66 | Expired |
| US5433615A | Categorized test item reporting system | Physics | 62 | Expired |
| US5558521A | System for preventing bias in test answer scoring | Emerging Cross-Sectional Technologies | 59 | Expired |
| US5716213A | Method for preventing bias in test answer scoring | Emerging Cross-Sectional Technologies | 58 | Expired |
| US5458493A | Dynamic on-line scoring guide | Emerging Cross-Sectional Technologies | 58 | Expired |
| US5735694A | Collaborative and quality control scoring method | Emerging Cross-Sectional Technologies | 56 | Expired |
| US5690497A | Dynamic on-line scoring method | Emerging Cross-Sectional Technologies | 55 | Expired |
| US5752836A | Categorized test item reporting method | Emerging Cross-Sectional Technologies | 52 | Expired |
| US5709551A | Multiple test item scoring method | Emerging Cross-Sectional Technologies | 48 | Expired |
| US5718591A | Method for providing performance feedback to test resolvers | Emerging Cross-Sectional Technologies | 43 | Expired |
| US6155839A | Dynamic on-line scoring guide and method | Emerging Cross-Sectional Technologies | 41 | Expired |
| US5184003A | Scannable form having a control mark column with encoded data marks | Physics | 38 | Expired |
| US5531429A | Variable printing and selective binding of booklets | Emerging Cross-Sectional Technologies | 35 | Expired |
| US6183261A | Collaborative and quality control scoring system and method | Emerging Cross-Sectional Technologies | 32 | Expired |
| US6168440A | Multiple test item scoring system and method | Emerging Cross-Sectional Technologies | 31 | Expired |
| US5711673A | Method for interpreting a plurality of response marks on a scannable surface | Physics | 30 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.