SYSTEM DEVELOPMENT INC.
28Patents
4Active
28Granted
38Portfolio score
Filing activity: Sep 2, 1975 → Nov 10, 2014
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4267568A | Information storage and retrieval system | Emerging Cross-Sectional Technologies | 533 | Expired |
| US4045814A | Method and apparatus for scrambling and unscrambling communication signals | Electricity | 113 | Expired |
| US4019201A | Method and apparatus for scrambling and unscrambling communication signals | Electricity | 112 | Expired |
| US4068298A | Information storage and retrieval system | Emerging Cross-Sectional Technologies | 61 | Expired |
| US4054255A | Microwave ice detector | Physics | 55 | Expired |
| US4597057A | System for compressed storage of 8-bit ASCII bytes using coded strings of 4 bit nibbles | Electricity | 53 | Expired |
| US4471459A | Digital data processing method and means for word classification by pattern analysis | Physics | 44 | Expired |
| US4422158A | Method and means for interrogating a layered data base | Emerging Cross-Sectional Technologies | 42 | Expired |
| US4614528A | Dry air breather assembly | Performing Operations; Transporting | 36 | Expired |
| US5160816A | Two dimensional sound diffusor | Fixed Constructions | 33 | Expired |
| US4060212A | Deicing apparatus and method | Electricity | 32 | Expired |
| US4495566A | Method and means using digital data processing means for locating representations in a stored textual data base | Emerging Cross-Sectional Technologies | 31 | Expired |
| US4606660A | Printer kit for letter sorting machines | Emerging Cross-Sectional Technologies | 29 | Expired |
| US4290115A | Data processing method and means for determining degree of match between two data arrays | Emerging Cross-Sectional Technologies | 26 | Expired |
| US4382277A | Method and means utilizing multiple processing means for determining degree of match between two data arrays | Emerging Cross-Sectional Technologies | 23 | Expired |
| US4584719A | Fiber optic workstation datalink interface | Electricity | 14 | Expired |
| US4462081A | Signal processing system | Physics | 14 | Expired |
| US4249033A | Vented radio frequency shielded enclosure | Electricity | 12 | Expired |
| US4628303A | Visual monitor for electrical signals | Physics | 9 | Expired |
| US4580858A | Alignment fixture assembly for surface-mount connectors | Emerging Cross-Sectional Technologies | 7 | Expired |
| US4593290A | Collapsible antenna assembly | Electricity | 6 | Expired |
| US4024576A | Method and apparatus for scrambling and unscrambling communication signals | Electricity | 4 | Expired |
| US8363237B1 | Active printing system and method for printing based on image size | Physics | 3 | Active |
| US4665461A | Circuit for reducing electromagnetic interference from magnetic core keyboards | Emerging Cross-Sectional Technologies | 2 | Expired |
| US4134077A | Amplifier circuit operable over a wide temperature range | Electricity | 2 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.