Clark E. Johnson, Jr.
26Patents
8h-index
13Co-inventors
72Inventor score
Filing activity: Apr 14, 1975 → May 8, 2024
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6374364B1 | Fault tolerant computing system using instruction counting | Physics | 45 | Expired |
| US6072780A | Dial up telephone conferencing system controlled by an online computer network | Electricity | 42 | Expired |
| US6266328A | Dial up telephone conferencing system controlled by an online computer network | Electricity | 27 | Expired |
| US4818119A | Hot bearing warning bolt | Mechanical Engineering; Lighting; Heating | 26 | Expired |
| US4119911A | Magnetoresistor displacement sensor using a magnetoresistor positioned between relatively moving magnetized toothed members | Physics | 17 | Expired |
| US6661779B2 | Dial up telephone conferencing system controlled by an online computer network | Electricity | 14 | Expired |
| US6480474B2 | Telephone call-back system controlled by an online data network in real-time | Electricity | 10 | Expired |
| US6985294B1 | Full spectrum color projector | Electricity | 8 | Expired |
| US4127878A | Magnetic tape recorder/reproducer for ratio recording with synchronized internal and external clock rates | Electricity | 8 | Expired |
| US4158203A | Arrangement for recording images appearing on a cathode ray tube | Physics | 7 | Expired |
| US6593972B1 | Interactive display system | Electricity | 7 | Expired |
| US7437000B1 | Full spectrum color detecting pixel camera | Physics | 7 | Expired |
| US4492990A | Noise reduction system | Physics | 6 | Expired |
| US4451858A | Analog recording system | Physics | 5 | Expired |
| US7522542B2 | Dial up telephone conferencing system controlled by an online computer network | Electricity | 4 | Active |
| US8891344B1 | Wave-based optical data storage | Physics | 3 | Active |
| US9330706B1 | Write once read forever archival data storage | Physics | 2 | Active |
| US4013239A | Continuous loop tape cassette | Physics | 2 | Expired |
| US8507836B1 | Software defined lensing | Electricity | 2 | Active |
| US4107752A | High density magnetic storage disc comprising a spiral of magnetic tape | Physics | 1 | Expired |
| US4183028A | High speed data recording arrangement | Physics | 1 | Expired |
| US7521680B1 | Electromagnetic spectral-based imaging devices and methods | Emerging Cross-Sectional Technologies | 1 | Active |
| US12080328B1 | Light-transmissive data storage sandwich | Physics | 1 | Active |
| US8077844B2 | Dial up telephone conferencing system controlled by an online computer network | Electricity | 0 | Active |
| US12300291B2 | Light-transmissive data storage sandwich | Physics | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.