Donald N. Halgren
39Patents
18h-index
10Co-inventors
78Inventor score
Filing activity: Apr 5, 1993 → Aug 28, 2012
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US7338473B2 | Pneumoseal trocar arrangement | Human Necessities | 171 | Expired |
| US5666112A | Key for flexible keyboard | Emerging Cross-Sectional Technologies | 130 | Expired |
| US5493702A | Antenna transmission coupling arrangement | Electricity | 127 | Expired |
| US5459461A | Inflatable keyboard | Emerging Cross-Sectional Technologies | 98 | Expired |
| US5742241A | Flexible data entry panel | Emerging Cross-Sectional Technologies | 85 | Expired |
| US5711014A | Antenna transmission coupling arrangement | Electricity | 80 | Expired |
| US7182752B2 | Continuous gas flow trocar assembly | Human Necessities | 78 | Expired |
| US7285112B2 | Gas flow trocar arrangement | Human Necessities | 67 | Expired |
| US7413559B2 | Gas flow trocar arrangement | Human Necessities | 61 | Active |
| US6598922B2 | Pickup truck bed extender apparatus | Performing Operations; Transporting | 45 | Expired |
| US6635035B1 | Tissue irrigation arrangement | Human Necessities | 38 | Expired |
| US5648771A | Wrist rest bag for flexible keyboard | Emerging Cross-Sectional Technologies | 33 | Expired |
| US8216189B2 | Continuous gas flow trocar assembly | Human Necessities | 32 | Active |
| US6594471B1 | Radiative focal area antenna transmission coupling arrangement | Electricity | 28 | Expired |
| US6112106A | Antenna transmission coupling arrangement | Electricity | 27 | Expired |
| US6885845B1 | Personal communication device connectivity arrangement | Electricity | 27 | Expired |
| US6313762A | Keyboard with keys for moving cursor | Electricity | 20 | Expired |
| US7400858B2 | Radiative focal area antenna transmission coupling arrangement | Electricity | 18 | Active |
| US5691716A | Keyboard with keys for moving cursor | Electricity | 17 | Expired |
| US6052071A | Keyboard with keys for moving cursor | Electricity | 15 | Expired |
| US5851477A | Reinforced tubing manufacture by a plastic processing screw machine | Performing Operations; Transporting | 15 | Expired |
| US6064343A | Antenna coupling arrangement | Electricity | 12 | Expired |
| US6074578A | Barrel wall conduit arrangements for a plastic processing screw machine | Performing Operations; Transporting | 9 | Expired |
| US5932154A | Process of making a plastic part with a retrofitted screw machine | Emerging Cross-Sectional Technologies | 8 | Expired |
| US5945061A | Method of input for a plasticating machine through a jewel orifice | Performing Operations; Transporting | 8 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.