James U. Lemke
61Patents
16h-index
41Co-inventors
84Inventor score
Filing activity: Jan 10, 1974 → Jul 26, 2018
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US7861679B2 | Cylinder and piston assemblies for opposed piston engines | Mechanical Engineering; Lighting; Heating | 76 | Active |
| US4339775A | Fast frame rate augmentation | Emerging Cross-Sectional Technologies | 60 | Expired |
| US4669011A | Slider assembly with dynamically positionable transducer | Physics | 58 | Expired |
| US6188535A | Arcuate scanning tape drive with a servo mechanism responsive to servo patterns in arcuate tracks on a moving tape | Physics | 44 | Expired |
| US4193098A | Segmented video playback apparatus with ancillary recording medium | Electricity | 38 | Expired |
| US4388659A | Tape recorder apparatus capable of playing back selected information while recording other information | Physics | 36 | Expired |
| US5526204A | Low drag liquid bearing recording head | Physics | 33 | Expired |
| US7360511B2 | Opposed piston engine | Mechanical Engineering; Lighting; Heating | 33 | Expired |
| US7156056B2 | Two-cycle, opposed-piston internal combustion engine | Mechanical Engineering; Lighting; Heating | 29 | Expired |
| US7640910B2 | Opposed piston internal-combustion engine with hypocycloidal drive and generator apparatus | Mechanical Engineering; Lighting; Heating | 27 | Active |
| US5193046A | Information recording apparatus with a liquid bearing | Physics | 24 | Expired |
| US5097368A | Information recording apparatus with a non-Newtonian liquid bearing | Physics | 23 | Expired |
| US4287539A | Segmented video recording with segment identification codes | Electricity | 20 | Expired |
| US5317463A | Information recording apparatus with a liquid bearing | Physics | 18 | Expired |
| US7784436B2 | Two-cycle, opposed-piston internal combustion engine | Mechanical Engineering; Lighting; Heating | 17 | Active |
| US7270108B2 | Opposed piston, homogeneous charge pilot ignition engine | Emerging Cross-Sectional Technologies | 17 | Expired |
| US4524390A | Imaging apparatus | Electricity | 15 | Expired |
| US5646806A | Edge tensioning sloping tape guide for arcuately scanning tape drive | Physics | 14 | Expired |
| US8539918B2 | Multi-cylinder opposed piston engines | Mechanical Engineering; Lighting; Heating | 13 | Active |
| US3931638A | Apparatus for modifying the time base of signals | Electricity | 13 | Expired |
| US3962725A | Magnetic-tape cartridge-loaded portable video camera using prerecorded timing signals to control the video time base | Emerging Cross-Sectional Technologies | 13 | Expired |
| US5488521A | Information recording apparatus with a non-newtonian liquid bearing | Physics | 12 | Expired |
| US7549401B2 | Two-cycle, opposed-piston internal combustion engine | Mechanical Engineering; Lighting; Heating | 11 | Expired |
| US7591235B2 | Opposed piston engine with piston compliance | Mechanical Engineering; Lighting; Heating | 9 | Active |
| US4322763A | Magnetic head having a controllable high-permeability tunnel within a low-permeability sleeve | Physics | 8 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.