Hiroki Murakami
139Patents
14h-index
180Co-inventors
89Inventor score
Filing activity: Jul 11, 1986 → Nov 30, 2023
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5621799A | Scrambled transmission system | Electricity | 92 | Expired |
| US7146631B1 | Content providing system and terminal used therein | Electricity | 61 | Expired |
| US5546461A | Scramble system for use in digital video signal recording and reproducing system or transmission and receiving system, comprising scramble apparatus and descramble apparatus | Electricity | 60 | Expired |
| US5706346A | Scrambling apparatus and descrambling apparatus | Electricity | 60 | Expired |
| US7391866B2 | Broadcast apparatus and reception apparatus for providing a storage service by which scrambled content is stored and descrambled using scrambling key list | Electricity | 58 | Expired |
| US5377266A | Scramble apparatus and descramble apparatus | Electricity | 55 | Expired |
| US10546741B2 | Selective growth method | Electricity | 46 | Active |
| US4767936A | Electronic device of element row type and wiring method of its electrode pattern | Electricity | 45 | Expired |
| US8753984B2 | Method and apparatus for forming silicon nitride film | Chemistry; Metallurgy | 31 | Active |
| US7401232B2 | Content playback apparatus method and program and key management apparatus and system | Electricity | 22 | Expired |
| US5483120A | Electroluminescent device having improved electrode terminals | Emerging Cross-Sectional Technologies | 20 | Expired |
| US5636279A | Scramble apparatus and descramble apparatus | Electricity | 19 | Expired |
| US7359883B2 | License management system, license management device, relay device and terminal device | Electricity | 18 | Expired |
| US5515437A | Scramble transmission apparatus and signal processing apparatus | Electricity | 15 | Expired |
| US5479070A | Light-emitting element device | Electricity | 14 | Expired |
| US8431494B2 | Film formation method and film formation apparatus | Chemistry; Metallurgy | 13 | Active |
| US6458204B1 | Method of producing high-quality silicon single crystals | Chemistry; Metallurgy | 13 | Expired |
| US8081522B2 | Page buffer circuit for electrically rewritable non-volatile semiconductor memory device and control method | Physics | 12 | Active |
| US7251161B2 | Semiconductor device and method of controlling said semiconductor device | Physics | 11 | Expired |
| US5290681A | Method of assaying immunization stimulating activity | Chemistry; Metallurgy | 10 | Expired |
| US5551618A | Apparatus for cutting plate-shaped brittle material | Emerging Cross-Sectional Technologies | 10 | Expired |
| US6569535B2 | Silicon wafer and epitaxial silicon wafer utilizing same | Emerging Cross-Sectional Technologies | 10 | Expired |
| US6574986B2 | Oil separator and outdoor unit with the oil separator | Mechanical Engineering; Lighting; Heating | 10 | Expired |
| US9217971B1 | Fixing device, heating member, and image forming apparatus | Physics | 10 | Active |
| US5617476A | Audio scrambling system for scrambling and descrambling audio signals | Electricity | 9 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.