David G. Perkins
31Patents
14h-index
45Co-inventors
81Inventor score
Filing activity: Sep 11, 1991 → Apr 19, 2022
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6106457A | Compact imaging instrument system | Physics | 247 | Expired |
| US8292807B2 | Mobile medical workstation | Human Necessities | 121 | Active |
| US6142934A | Objective lens system for imaging instrument | Human Necessities | 91 | Expired |
| US6007204A | Compact ocular measuring system | Human Necessities | 87 | Expired |
| US6393431B1 | Compact imaging instrument system | Emerging Cross-Sectional Technologies | 76 | Expired |
| US5919130A | Video otoscope | Human Necessities | 72 | Expired |
| US5588856A | Sealing member and methods of sealing | Emerging Cross-Sectional Technologies | 58 | Expired |
| USD897185S1 | Handle | General | 29 | Active |
| US6010450A | Measuring adapter for viewing instrument | Human Necessities | 24 | Expired |
| US5202710A | Fixation card attachment for retinoscope | Physics | 23 | Expired |
| USD897184S1 | Handle | General | 20 | Active |
| US5200772A | Filter apparatus for retinoscope | Human Necessities | 20 | Expired |
| USD897186S1 | Handle | General | 18 | Active |
| USD432153S | Digital camera adapter | General | 14 | Expired |
| USD905238S1 | Medical viewing device | General | 11 | Active |
| USD905239S1 | Medical viewing device | General | 10 | Active |
| US5189449A | Retinoscope with external control sleeve | Human Necessities | 9 | Expired |
| USD905237S1 | Medical viewing device | General | 9 | Active |
| USD959661S1 | Medical viewing device | General | 6 | Active |
| USD926128S1 | Charger | General | 5 | Active |
| USD905240S1 | Medical viewing device | General | 5 | Active |
| USD935999S1 | Charger | General | 4 | Active |
| US11096627B2 | Medical examination system enabling interchangeable instrument operating modes | Mechanical Engineering; Lighting; Heating | 2 | Active |
| USD958339S1 | Medical viewing device | General | 1 | Active |
| USD958735S1 | Charger | General | 1 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.