David R. Freeman
11Patents
5h-index
10Co-inventors
63Inventor score
Filing activity: Dec 12, 1990 → Feb 25, 2015
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6487417B1 | Method and system for characterizing propagation of radiofrequency signal | Electricity | 88 | Expired |
| US6728544B1 | Methods and techniques in channel assignment in a cellular network | Electricity | 21 | Expired |
| US5329270A | Transformer core comprising groups of amorphous steel strips wrapped about the core window | Emerging Cross-Sectional Technologies | 10 | Expired |
| US5063654A | Method for making packets of amorphous metal strip for transformer-core manufacture | Emerging Cross-Sectional Technologies | 9 | Expired |
| US5528817A | Apparatus for making packets of amorphous steel strip for transformer core manufacture | Emerging Cross-Sectional Technologies | 7 | Expired |
| US5398403A | Method of making a transformer core comprising groups of amorphous steel strips wrapped about the core window | Emerging Cross-Sectional Technologies | 5 | Expired |
| US9718147B2 | Method and system to start and use combination filler wire feed and high intensity energy source for root pass welding of the inner diameter of clad pipe | Performing Operations; Transporting | 3 | Active |
| US5191700A | Method for making packets of amorphous metal strip for transformer-core manufacture | Emerging Cross-Sectional Technologies | 3 | Expired |
| US5321883A | Apparatus for making a transformer core comprising strips of amorphous stell wrapped around the core window | Emerging Cross-Sectional Technologies | 3 | Expired |
| US8005886B2 | Systems and methods for generating network messages | Electricity | 1 | Active |
| US5347706A | Method for making packets of amorphous steel strip for transformer core manufacture | Emerging Cross-Sectional Technologies | 1 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.