Doryokuro Kakunenryo Kaihatsu Jigyodan
195Patents
0Active
195Granted
41Portfolio score
Filing activity: Oct 5, 1973 → Feb 1, 1999
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5023045A | Plant malfunction diagnostic method | Emerging Cross-Sectional Technologies | 90 | Expired |
| US4896941A | Image-transmitting fiber | Physics | 88 | Expired |
| US4922782A | Manipulator shoulder mechanism | Emerging Cross-Sectional Technologies | 88 | Expired |
| US5285123A | Turbo-generator | Emerging Cross-Sectional Technologies | 81 | Expired |
| US5254075A | Internal circulation type centrifugal extractor | Performing Operations; Transporting | 32 | Expired |
| US4895678A | Method for thermal decomposition treatment of radioactive waste | Emerging Cross-Sectional Technologies | 32 | Expired |
| US5457997A | Laser ultrasonic detection method and apparatus therefor | Physics | 30 | Expired |
| US5465849A | Column and method for separating particles in accordance with their magnetic susceptibility | Performing Operations; Transporting | 26 | Expired |
| US4364859A | Method for producing oxide powder | Emerging Cross-Sectional Technologies | 25 | Expired |
| US4857040A | High-speed centrifugal extractor having improved weirs | Performing Operations; Transporting | 24 | Expired |
| US4475866A | Liquid metal mechanical pump | Mechanical Engineering; Lighting; Heating | 23 | Expired |
| US5309493A | Fuel rod for nuclear reactor | Emerging Cross-Sectional Technologies | 23 | Expired |
| US4565670A | Heat treating apparatus using microwaves | Emerging Cross-Sectional Technologies | 22 | Expired |
| US4909316A | Dual-tube heat pipe type heat exchanger | Mechanical Engineering; Lighting; Heating | 22 | Expired |
| US5834867A | Electromagnetic rotary vibrator and damper for a rotary body | Mechanical Engineering; Lighting; Heating | 21 | Expired |
| US4460398A | Freeze valve having multiple heating-cooling means | Emerging Cross-Sectional Technologies | 20 | Expired |
| US4579711A | Fuel assembly spacer | Emerging Cross-Sectional Technologies | 19 | Expired |
| US4444723A | Denitration systems | Chemistry; Metallurgy | 18 | Expired |
| US4379009A | Sealing method using heat-shrinkable film | Emerging Cross-Sectional Technologies | 18 | Expired |
| US4963200A | Dispersion strengthened ferritic steel for high temperature structural use | Performing Operations; Transporting | 18 | Expired |
| US4465936A | Complex personal dosimeter | Physics | 18 | Expired |
| US5304701A | Melting furnace for treating wastes and a heating method of the same | Emerging Cross-Sectional Technologies | 17 | Expired |
| US6072495A | Object search method and object search system | Physics | 17 | Expired |
| US5767400A | Hydraulic test system mounted with borehole television set for simultaneous observation in front and lateral directions | Fixed Constructions | 16 | Expired |
| US3943751A | Method and apparatus for continuously measuring hydrogen concentration in argon gas | Emerging Cross-Sectional Technologies | 15 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.