Johan Frederik Witte
14Patents
7h-index
14Co-inventors
63Inventor score
Filing activity: Aug 29, 1974 → Feb 3, 2020
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4844778A | Membrane with perforations, method for producing such a membrane and separating device comprising one or more of such membranes | Performing Operations; Transporting | 30 | Expired |
| US7535295B1 | Chopper stabilized amplifiers combining low chopper noise and linear frequency characteristics | Electricity | 26 | Active |
| US7920032B2 | Oscillator based on thermal diffusion | Electricity | 18 | Active |
| US4045879A | Process for treating oil containing vegetable raw materials | Chemistry; Metallurgy | 17 | Expired |
| US4122104A | Process for extracting oils from oil containing raw materials | Chemistry; Metallurgy | 16 | Expired |
| US7605716B2 | Telemetry system with an insulating connector | Physics | 15 | Active |
| US4024288A | Apparatus for treating finely divided materials with gaseous fluid | Mechanical Engineering; Lighting; Heating | 7 | Expired |
| US4486395A | Continuously working crystallizer | Performing Operations; Transporting | 5 | Expired |
| US4126088A | Apparatus for pressing liquids, such as oil and the like from liquid containing material | Performing Operations; Transporting | 2 | Expired |
| US4147098A | Apparatus for continuous treatment of material | Human Necessities | 2 | Expired |
| US4112836A | Apparatus for treating oil containing vegetable raw materials | Mechanical Engineering; Lighting; Heating | 1 | Expired |
| US3972278A | Apparatus for treating finely divided materials with gaseous fluid | Chemistry; Metallurgy | 1 | Expired |
| US11038522B1 | Offset compensation in ADC circuitry | Electricity | 0 | Active |
| US8344740B2 | System for diagnosing impedances having accurate current source and accurate voltage level-shift | Performing Operations; Transporting | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.