Ebara Research Co., Ltd.
33Patents
0Active
33Granted
37Portfolio score
Filing activity: Mar 26, 1986 → Mar 15, 2005
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5073268A | Process and system for purifying pure water or ultrapure water | Emerging Cross-Sectional Technologies | 131 | Expired |
| US4750917A | Method of and apparatus for cleaning air by irradiation of ultraviolet rays | Performing Operations; Transporting | 53 | Expired |
| US5154733A | Photoelectron emitting member and method of electrically charging fine particles with photoelectrons | Electricity | 42 | Expired |
| US4699525A | Thrust bearing | Mechanical Engineering; Lighting; Heating | 40 | Expired |
| US4641842A | Shaft sealing device with floating seal member | Mechanical Engineering; Lighting; Heating | 36 | Expired |
| US5685696A | Centrifugal or mixed flow turbomachines | Emerging Cross-Sectional Technologies | 36 | Expired |
| US5922105A | Method and apparatus for the preparation of clean gases | Performing Operations; Transporting | 29 | Expired |
| US5142175A | Magnetic bearing system | Mechanical Engineering; Lighting; Heating | 23 | Expired |
| US4885491A | Unstable vibration prevention apparatus for magnetic bearing system | Mechanical Engineering; Lighting; Heating | 23 | Expired |
| US5225000A | Method for cleaning closed spaces with ultraviolet rays | Performing Operations; Transporting | 23 | Expired |
| US5380503A | Stocker | Performing Operations; Transporting | 21 | Expired |
| US6062819A | Turbomachinery and method of manufacturing the same | Mechanical Engineering; Lighting; Heating | 21 | Expired |
| US4820949A | Electrically powered apparatus | Electricity | 18 | Expired |
| US4879500A | Controller for magnetic bearing system | Mechanical Engineering; Lighting; Heating | 16 | Expired |
| US5322674A | Method of treating waste gases containing halogen compounds | Performing Operations; Transporting | 14 | Expired |
| US4910449A | System for preventing unbalance vibrations and synchronous disturbance vibrations | Mechanical Engineering; Lighting; Heating | 14 | Expired |
| US5190627A | Process for removing dissolved oxygen from water and system therefor | Chemistry; Metallurgy | 13 | Expired |
| US5060805A | Photoelectron emitting member | Electricity | 13 | Expired |
| US5186213A | 29 | Emerging Cross-Sectional Technologies | 10 | Expired |
| US5594166A | Cantilever for use with atomic force microscope and process for the production thereof | Emerging Cross-Sectional Technologies | 10 | Expired |
| US4920290A | Active magnetic bearing apparatus | Mechanical Engineering; Lighting; Heating | 10 | Expired |
| US4946345A | Turbo-molecular pump | Mechanical Engineering; Lighting; Heating | 9 | Expired |
| US5723029A | Photo-electric chemical apparatus using carbon cluster electrode | Emerging Cross-Sectional Technologies | 7 | Expired |
| US5614663A | Cantilever for use with atomic force microscope and process for the production thereof | Emerging Cross-Sectional Technologies | 4 | Expired |
| US6099731A | Method and apparatus for treating water | Emerging Cross-Sectional Technologies | 4 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.