Masahiko Sakamoto
24Patents
11h-index
61Co-inventors
78Inventor score
Filing activity: Sep 8, 1982 → Sep 22, 2009
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6299050A | Friction stir welding apparatus and method | Performing Operations; Transporting | 65 | Expired |
| US6875951B2 | Laser machining device | Performing Operations; Transporting | 55 | Expired |
| US5621243A | Semiconductor device having thermal stress resistance structure | Electricity | 44 | Expired |
| US5699936A | Liquid dispensing system | Human Necessities | 24 | Expired |
| US5051397A | Joined body of high-temperature oxide superconductor and method of joining oxide superconductors | Emerging Cross-Sectional Technologies | 20 | Expired |
| US5481095A | Code reading pattern and an image pickup apparatus for reading the pattern | Physics | 15 | Expired |
| US5231366A | Superconducting magnetic field generating apparatus and method of producing the same | Emerging Cross-Sectional Technologies | 13 | Expired |
| US6595403B2 | Friction stir welding method | Performing Operations; Transporting | 12 | Expired |
| US4654506A | Method and apparatus for detecting and regulating position of welding electron beam | Electricity | 12 | Expired |
| US5092366A | Air pipe for a lighting fixture for a vehicle | Mechanical Engineering; Lighting; Heating | 11 | Expired |
| US7097091B2 | Friction stir welding method and component part welded by the method | Performing Operations; Transporting | 11 | Expired |
| US4988194A | Optical storage inspection unit calibration disk | Physics | 10 | Expired |
| US7262710B2 | Collision time estimation apparatus for vehicles, collision time estimation method for vehicles, collision alarm apparatus for vehicles, and collision alarm method for vehicles | Physics | 9 | Expired |
| US4615658A | Shroud for gas turbines | Emerging Cross-Sectional Technologies | 9 | Expired |
| US6690024B1 | Laser inspection apparatus | Physics | 8 | Expired |
| US6739495B2 | Friction stir welding method and component part welded by the method | Performing Operations; Transporting | 8 | Expired |
| US4879473A | Electron-beam exposure apparatus | Electricity | 8 | Expired |
| US4465530A | Gas turbine nozzle having superior thermal fatigue resistance | Mechanical Engineering; Lighting; Heating | 7 | Expired |
| US6972402B2 | Photoelectric rotary encoder | Physics | 5 | Expired |
| US7285769B2 | Optical encoder with reduced reflected light error having a light non-transparent portion with inclined surfaces | Physics | 3 | Expired |
| US7193962B2 | Code disk with a plurality of tracks having different patterns | Physics | 2 | Expired |
| US7612331B2 | Code disk with a plurality of tracks having different patterns | Physics | 1 | Active |
| US7538313B2 | Optical encoder having a no track portion of an optical scale being placed at a position symmetrical to a light non-transparent portion within an irradiation region of incident light | Physics | 1 | Active |
| US7907505B2 | Code disk with a plurality of tracks having different patterns | Physics | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.