Keiichi Katayama
19Patents
7h-index
29Co-inventors
66Inventor score
Filing activity: Aug 15, 1980 → Jun 27, 2017
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5858620A | Semiconductor device and method for manufacturing the same | Physics | 132 | Expired |
| US6579657B1 | Material for forming a fine pattern and method for manufacturing a semiconductor device using the same | Electricity | 90 | Expired |
| US6319853A | Method of manufacturing a semiconductor device using a minute resist pattern, and a semiconductor device manufactured thereby | Physics | 58 | Expired |
| US4795927A | Control system for a magnetic type bearing | Mechanical Engineering; Lighting; Heating | 19 | Expired |
| US5317121A | Induction heating apparatus having openable and closable coil | Electricity | 17 | Expired |
| US5126522A | Induction heating apparatus for preventing the formation of stripes on plated steel | Emerging Cross-Sectional Technologies | 12 | Expired |
| US4471515A | Rolls for single facer | Performing Operations; Transporting | 9 | Expired |
| US4337884A | Single facer | Performing Operations; Transporting | 7 | Expired |
| US4316761A | Single facer | Performing Operations; Transporting | 7 | Expired |
| US4791830A | Balancer of reciprocating machine | Emerging Cross-Sectional Technologies | 5 | Expired |
| US4593549A | Method of controlling a tension levelling equipment | Performing Operations; Transporting | 5 | Expired |
| US4398328A | Rolls for single facer | Mechanical Engineering; Lighting; Heating | 3 | Expired |
| US9136791B2 | Motor driving device, integrated circuit device, motor apparatus and motor driving system | Electricity | 1 | Active |
| US9787231B2 | Motor driving device and control method of motor driving device | Electricity | 1 | Active |
| US9991826B2 | Motor control circuit, motor drive control apparatus and control method of motor drive control apparatus | Electricity | 0 | Active |
| US9806662B2 | Motor drive controller and method for controlling motor | Electricity | 0 | Active |
| US4594209A | Process for the preparation of voltage non-linearity type resistors | Chemistry; Metallurgy | 0 | Expired |
| US9647584B2 | Motor drive controller and control method of motor drive controller | Electricity | 0 | Active |
| US10361644B2 | Motor driving controller and motor driving control method | Electricity | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.