Richard D. Freeman
14Patents
10h-index
24Co-inventors
72Inventor score
Filing activity: May 6, 1970 → Jan 12, 2015
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4819267A | Solid state key for controlling access to computer systems and to computer software and/or for secure communications | Physics | 123 | Expired |
| US5594363A | Logic cell and routing architecture in a field programmable gate array | Electricity | 117 | Expired |
| US5764096A | General purpose, non-volatile reprogrammable switch | Physics | 59 | Expired |
| US5594698A | Random access memory (RAM) based configurable arrays | Electricity | 38 | Expired |
| US4195338A | Computer typesetting | Physics | 29 | Expired |
| US5214512A | Keyed, true-transparency image information combine | Electricity | 22 | Expired |
| US5385390A | Portable seat carrier | Human Necessities | 17 | Expired |
| US5574883A | Single chip processing unit providing immediate availability of frequently used microcode instruction words | Physics | 16 | Expired |
| US5634108A | Single chip processing system utilizing general cache and microcode cache enabling simultaneous multiple functions | Physics | 15 | Expired |
| US8117577B1 | Determining timing paths within a circuit block of a programmable integrated circuit | Physics | 12 | Active |
| US5446848A | Entry level data processing system which is expandable by a factor of two to a partitionable upgraded system with low overhead | Physics | 10 | Expired |
| USD368680S | Combined bicycle and cart | General | 5 | Expired |
| US9726609B2 | Wavelength selective SERS nanotags | Emerging Cross-Sectional Technologies | 4 | Active |
| US9566693B2 | Turnbuckle wrench assembly | Performing Operations; Transporting | 1 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.