Hideaki Kawakami
81Patents
27h-index
92Co-inventors
91Inventor score
Filing activity: Dec 10, 1973 → Feb 12, 2014
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5619237A | Replaceable ink tank | Performing Operations; Transporting | 180 | Expired |
| US4942441A | Thin film semiconductor device and method of manufacturing the same | Physics | 89 | Expired |
| US4508429A | Method for driving liquid crystal element employing ferroelectric liquid crystal | Physics | 84 | Expired |
| US5580042A | Sheet conveying apparatus | Emerging Cross-Sectional Technologies | 69 | Expired |
| US4583122A | Imaging display device | Physics | 62 | Expired |
| US3995942A | Method of driving a matrix type liquid crystal display device | Physics | 60 | Expired |
| US5672019A | Sheet supplying apparatus | Emerging Cross-Sectional Technologies | 59 | Expired |
| US4317115A | Driving device for matrix-type display panel using guest-host type phase transition liquid crystal | Physics | 58 | Expired |
| US5235449A | Polarizer with patterned diacetylene layer, method for producing the same, and liquid crystal display device including such polarizer | Physics | 57 | Expired |
| US5572105A | Stepping motor control method including varying the number of split sections in one step drive period of a stepping motor | Electricity | 56 | Expired |
| US5620174A | Sheet conveying apparatus | Emerging Cross-Sectional Technologies | 54 | Expired |
| US4699239A | Driving control device of a crawler type tractor | Performing Operations; Transporting | 53 | Expired |
| US5841261A | System for controlling stepping motor for dividing a single step of the motor into plural sections and applying voltages whose levels are determined in accordance with the sections | Electricity | 52 | Expired |
| US6361158B1 | Ink container for ink jet printing, holder for the container, carriage for the holder and ink jet printer | Performing Operations; Transporting | 49 | Expired |
| US6168270A | Recording apparatus having a sheet conveying force adjustment system | Performing Operations; Transporting | 48 | Expired |
| US6336709B1 | Ink container for ink jet printer, holder for the container carriage for the holder and ink jet printer | Performing Operations; Transporting | 47 | Expired |
| US4380008A | Method of driving a matrix type phase transition liquid crystal display device to obtain a holding effect and improved response time for the erasing operation | Physics | 45 | Expired |
| US4062626A | Liquid crystal display device | Physics | 44 | Expired |
| US6045220A | Sheet supply apparatus | Performing Operations; Transporting | 44 | Expired |
| US5847719A | Recording apparatus | Performing Operations; Transporting | 43 | Expired |
| US5480247A | Sheet supplying apparatus | Performing Operations; Transporting | 35 | Expired |
| US5793399A | Sheet supplying apparatus | Performing Operations; Transporting | 35 | Expired |
| US3976362A | Method of driving liquid crystal matrix display device | Physics | 34 | Expired |
| US4532506A | Matrix display and driving method therefor | Physics | 34 | Expired |
| US5992993A | Sheet supply apparatus | Performing Operations; Transporting | 30 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.