Masao Majima
59Patents
19h-index
28Co-inventors
84Inventor score
Filing activity: Oct 2, 1989 → Dec 1, 2015
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5396360A | Wavelength-multiplexed optical communication system and optical amplifier used therefor | Electricity | 72 | Expired |
| US5586131A | Oscillation polarization mode selective semiconductor laser, light source apparatus and optical communication system using the laser | Electricity | 69 | Expired |
| US5949562A | Transmission wavelength control method permitting efficient wavelength multiplexing, optical communication method, optical transmitter, optical transmitter-receiver apparatus, and optical communication system | Electricity | 60 | Expired |
| US6188499A | Wavelength locking method for tunable filter, wavelength locking apparatus and wavelength division multiplexing communication network using the same | Electricity | 58 | Expired |
| US5659560A | Apparatus and method for driving oscillation polarization selective light source, and optical communication system using the same | Electricity | 56 | Expired |
| US6104516A | Wavelength-changeable light source capable of changing wavelength of output light, optical communication network using the same and wavelength control method for controlling wavelength | Electricity | 53 | Expired |
| US5594577A | Optical receiver and optical transmission system using the receiver | Electricity | 38 | Expired |
| US5369515A | Node for loop-type optical LAN and a loop-type optical LAN using the same | Electricity | 37 | Expired |
| US5502589A | Optical communication systems and optical nodes for use therein | Electricity | 33 | Expired |
| US5309275A | Semiconductor optical amplifying apparatus | Electricity | 31 | Expired |
| US5343314A | Optical fiber communication method and multimedia optical fiber network using the same | Electricity | 28 | Expired |
| US5801861A | Communication system for performing wavelength division multiplexing communications, and wavelength control method used in the system | Electricity | 28 | Expired |
| US5552919A | Tunable-filter control method, tunable-filter control apparatus and optical communication system using the same | Electricity | 27 | Expired |
| US5144466A | Optical fiber communication method and multimedia optical fiber network using the same | Electricity | 27 | Expired |
| US6937372B2 | Light beam deflecting apparatus, image forming apparatus utilizing the same and drive method therefor | Physics | 27 | Expired |
| US5654814A | Optical semiconductor apparatus and optical communication system using the apparatus | Electricity | 24 | Expired |
| US7148591B2 | Oscillating device | Emerging Cross-Sectional Technologies | 22 | Expired |
| US5850408A | Method of driving semiconductor laser with wide modulation band, optical communication method, semiconductor laser device, node, and optical communication system | Electricity | 20 | Expired |
| US6055251A | Method and apparatus for frequency modulating a semiconductor laser, and an optical communication system using the same | Electricity | 19 | Expired |
| US6101014A | Wavelength controlling method enabling use of wider wavelength range and network system using the method | Electricity | 19 | Expired |
| US5886802A | Wavelength control method and optical communication apparatus for performing wavelength division multiplex communication | Electricity | 17 | Expired |
| US7794222B2 | Mold, pattern forming method, and pattern forming apparatus | Physics | 14 | Active |
| US6800844B2 | Two-dimensional optical scanner and method of driving the same | Physics | 13 | Expired |
| US5223972A | Optical amplifiers, optical communication systems networks using the amplifier and integrated optical nodes including the amplifier | Electricity | 12 | Expired |
| US5774243A | Control method of selecting wavelength of optical filter, wavelength control method of output light from light outputting apparatus, wavelength division multiplexing method in optical communication system and method for correcting relation between control | Electricity | 12 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.