Masaaki Takizawa
69Patents
21h-index
85Co-inventors
91Inventor score
Filing activity: Sep 23, 1975 → Aug 23, 2023
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5477546A | Teleconference terminal equipment and teleconference module | Electricity | 178 | Expired |
| US5365265A | Multipoint teleconference system employing communication channels set in ring configuration | Electricity | 135 | Expired |
| US5371535A | Multiplexing transmission apparatus for image signal and multiplexing system | Electricity | 63 | Expired |
| US4939583A | Entropy-coding system | Electricity | 56 | Expired |
| US4285310A | Dual intake valve type internal combustion engine | Emerging Cross-Sectional Technologies | 55 | Expired |
| US5402418A | Multipoint teleconference system employing H. 221 frames | Electricity | 54 | Expired |
| US5396269A | Television telephone | Electricity | 48 | Expired |
| US5325215A | Matrix multiplier and picture transforming coder using the same | Physics | 40 | Expired |
| US4258671A | Variable valve lift mechanism used in an internal combustion engine | Mechanical Engineering; Lighting; Heating | 38 | Expired |
| US5689300A | Picture codec and teleconference terminal equipment | Electricity | 34 | Expired |
| US5604738A | Multipoint teleconference system employing H. 221 frames | Electricity | 34 | Expired |
| US5000299A | Shock absorber using electro-viscous fluid | Chemistry; Metallurgy | 33 | Expired |
| US5677727A | Television telephone | Electricity | 31 | Expired |
| US4354460A | Variable valve event engine | Mechanical Engineering; Lighting; Heating | 30 | Expired |
| US5028995A | Picture signal processor, picture signal coder and picture signal interpolator | Electricity | 28 | Expired |
| US5790178A | Picture codec for teleconference equipment, which forms and displays picture-in-frame including at least two of received motion picture, a received still picture and a self motion picture in an optional combination | Electricity | 27 | Expired |
| US4452188A | Apparatus for controlling feed of oil discharged from oil pump | Mechanical Engineering; Lighting; Heating | 27 | Expired |
| US6458208B1 | Film forming apparatus | Emerging Cross-Sectional Technologies | 26 | Expired |
| US4253434A | Variable valve event engine | Emerging Cross-Sectional Technologies | 24 | Expired |
| US6549414B1 | Computers | Electricity | 23 | Expired |
| US4610421A | Mounting construction for engine-transmission assembly | Mechanical Engineering; Lighting; Heating | 21 | Expired |
| US4038959A | Internal combustion engine with a subsidiary combustion chamber | Emerging Cross-Sectional Technologies | 21 | Expired |
| US4408580A | Hydraulic valve lift device | Mechanical Engineering; Lighting; Heating | 21 | Expired |
| US4452187A | Hydraulic valve lift device | Mechanical Engineering; Lighting; Heating | 21 | Expired |
| US6165552A | Film forming method | Emerging Cross-Sectional Technologies | 21 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.