David Friend
13Patents
9h-index
17Co-inventors
69Inventor score
Filing activity: Dec 23, 1977 → Oct 3, 2017
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6139865A | Taste-masked microcapsule compositions and methods of manufacture | Human Necessities | 224 | Expired |
| US5811388A | Delivery of drugs to the lower GI tract | Human Necessities | 143 | Expired |
| US4257305A | Pressure sensitive controller for electronic musical instruments | Emerging Cross-Sectional Technologies | 55 | Expired |
| US5238933A | Skin permeation enhancer compositions | Human Necessities | 50 | Expired |
| US6355270B1 | Particles for oral delivery of peptides and proteins | Human Necessities | 26 | Expired |
| US5751794A | Proactive voice mail service | Electricity | 21 | Expired |
| US5729595A | Never-busy facsimile service | Electricity | 19 | Expired |
| US5656294A | Colonic delivery of drugs | Human Necessities | 19 | Expired |
| US6063402A | Purified galactomannan as an improved pharmaceutical excipient | Chemistry; Metallurgy | 14 | Expired |
| US5112541A | Microencapsulated lubricating fluids and additives and method of making same | Performing Operations; Transporting | 3 | Expired |
| US5091122A | Method for microencapsulation of basic solutions | Emerging Cross-Sectional Technologies | 2 | Expired |
| US5993860A | NSADI delivery employing a powdered hydrocolloid gum obtainable from higher plants | Human Necessities | 1 | Expired |
| US11419835B2 | Method of treatment and prevention of bacterial vaginosis | Human Necessities | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.