David L. Henderson
31Patents
12h-index
48Co-inventors
81Inventor score
Filing activity: Jan 30, 1975 → Dec 6, 2013
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4317273A | Method of making high coupling ratio DMOS electrically programmable ROM | Electricity | 64 | Expired |
| US6079959A | Reciprocating pump | Mechanical Engineering; Lighting; Heating | 59 | Expired |
| US6318936A | Plunge router adjustment mechanism and method | Emerging Cross-Sectional Technologies | 57 | Expired |
| US6792469B1 | System and method for monitoring and controlling the production of audio and video streams | Electricity | 47 | Expired |
| US8878923B2 | System and method for enhanced predictive autofocusing | Physics | 46 | Active |
| US4893116A | Logical drawing and transparency circuits for bit mapped video display controllers | Physics | 43 | Expired |
| US6271505A | Field conversion electric water heater | Mechanical Engineering; Lighting; Heating | 39 | Expired |
| US7506877B1 | Bit or tool extension and method of making same | Emerging Cross-Sectional Technologies | 28 | Active |
| US6520227B2 | Apparatus and method for mounting routers in tables | Emerging Cross-Sectional Technologies | 27 | Expired |
| US6231253A | Label printer with a peel bar, a separator bar and anti-buckle means | Performing Operations; Transporting | 22 | Expired |
| US6745723B1 | Water heater heat trap apparatus | Emerging Cross-Sectional Technologies | 15 | Expired |
| US6587862B1 | Apparatus and method for direct digital frequency synthesis | Physics | 14 | Expired |
| US4214921A | Method of manufacturing a corrosion resistant rotor assembly | Emerging Cross-Sectional Technologies | 12 | Expired |
| US8396269B2 | Image quality assessment including comparison of overlapped margins | Physics | 11 | Active |
| US4920344A | Digitally compensated multiplying digital to analog converter | Electricity | 10 | Expired |
| US4779029A | Digitally compensated multiplying digital to analog converter | Electricity | 10 | Expired |
| US6588378B1 | Water heater bottom pad/foam dam apparatus with integrated tank support members | Mechanical Engineering; Lighting; Heating | 9 | Expired |
| US5954265A | Diagnostic system for a fuel-fired water heater | Mechanical Engineering; Lighting; Heating | 9 | Expired |
| US4113518A | Method of manufacturing a corrosion resistant rotor assembly | Emerging Cross-Sectional Technologies | 9 | Expired |
| US6885816B1 | Water heater apparatus and associated manufacturing and insulation methods | Performing Operations; Transporting | 8 | Expired |
| US8314837B2 | System and method for imaging with enhanced depth of field | Physics | 7 | Active |
| US6898375B2 | Water heater electrical enclosure insert/foam dam | Mechanical Engineering; Lighting; Heating | 6 | Expired |
| US3953275A | Method and apparatus for liquid adhesive application | Emerging Cross-Sectional Technologies | 5 | Expired |
| US6240249A | Electric water heater with simplified phase conversion apparatus | Mechanical Engineering; Lighting; Heating | 4 | Expired |
| US6917756B2 | Water heater electrical enclosure insert/foam dam | Mechanical Engineering; Lighting; Heating | 3 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.