John P. Lappington
12Patents
12h-index
9Co-inventors
71Inventor score
Filing activity: May 20, 1976 → Oct 27, 1997
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5343239A | Transaction based interactive television system | Human Necessities | 668 | Expired |
| US5682195A | Digital cable headend for cable television delivery system | Electricity | 451 | Expired |
| US5734413A | Transaction based interactive television system | Electricity | 371 | Expired |
| US5381459A | System for distributing radio telephone signals over a cable television network | Electricity | 319 | Expired |
| US5764275A | Interactive television security through transaction time stamping | Electricity | 270 | Expired |
| US5519433A | Interactive television security through transaction time stamping | Human Necessities | 266 | Expired |
| US5526035A | Transaction based interactive television system | Human Necessities | 225 | Expired |
| US5638113A | Transaction based interactive television system | Electricity | 211 | Expired |
| US4084240A | Mass production of electronic control units for engines | Mechanical Engineering; Lighting; Heating | 28 | Expired |
| US4128900A | Programmable read only memory for electronic engine control | Mechanical Engineering; Lighting; Heating | 23 | Expired |
| US4060714A | Input sensor circuit for a digital engine controller | Mechanical Engineering; Lighting; Heating | 16 | Expired |
| US7269841B1 | Digital cable headend for cable television delivery system | Electricity | 13 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.