ASTECH. CO., LTD.
14Patents
2Active
14Granted
37Portfolio score
Filing activity: Apr 7, 1976 → Apr 17, 2014
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4475193A | Power line carrier multi telephone extension system for full duplex conferencing between telephones | Electricity | 140 | Expired |
| US4523307A | Power line carrier multi telephone extension system for full duplex conferencing and intercom between telephones | Electricity | 113 | Expired |
| US4479033A | Telephone extension system utilizing power line carrier signals | Electricity | 108 | Expired |
| US4058678A | Remote signalling to a telephone line utilizing power line carrier signals | Electricity | 97 | Expired |
| US4514594A | Power line carrier telephone extension system for full duplex conferencing between telephones and having telephone call hold capability | Electricity | 87 | Expired |
| US4495386A | Telephone extension system utilizing power line carrier signals | Electricity | 85 | Expired |
| US4422605A | Reverser for jet engine | Mechanical Engineering; Lighting; Heating | 33 | Expired |
| US4182501A | Thrust reverser for jet engine forming active extension of jet tube | Emerging Cross-Sectional Technologies | 29 | Expired |
| US4212442A | Thrust reverser | Mechanical Engineering; Lighting; Heating | 24 | Expired |
| US4129269A | Single-skin thrust reverser for aircraft jet engines | Emerging Cross-Sectional Technologies | 20 | Expired |
| US4362015A | Double jet gas turbine engine equipped with a thrust reverser | Mechanical Engineering; Lighting; Heating | 17 | Expired |
| US6007029A | Boiler tube alignment link system | Mechanical Engineering; Lighting; Heating | 7 | Expired |
| US11420963B2 | Rebamipide prodrugs, preparation method and use thereof | Chemistry; Metallurgy | 0 | Active |
| US11712414B2 | Oral pharmaceutical composition for preventing or treating dry eye syndrome comprising rebamipide or a prodrug thereof | Human Necessities | 0 | Active |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.