Keizo Nakajima
17Patents
7h-index
25Co-inventors
66Inventor score
Filing activity: Jul 12, 1989 → Feb 4, 2009
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5842349A | Refrigeration system and method of installing same | Mechanical Engineering; Lighting; Heating | 27 | Expired |
| US5718119A | Refrigeration system and method of installing same | Mechanical Engineering; Lighting; Heating | 25 | Expired |
| US7675004B2 | Heating element and production method thereof | Electricity | 22 | Active |
| US5119221A | Liquid crystal display device comprising improved alignment layers for liquid crystal | Chemistry; Metallurgy | 15 | Expired |
| US5173342A | Liquid crystal orientation film and process for making the same | Chemistry; Metallurgy | 13 | Expired |
| US6336601B1 | Method for separating metallic material from waste printed circuit boards, and dry distillation apparatus used for waste treatment | Emerging Cross-Sectional Technologies | 11 | Expired |
| US6197211A | Ketone-containing working fluid for refrigerating cycle equipment and refrigerating cycle equipment having the same | Chemistry; Metallurgy | 9 | Expired |
| US6268317A | Working fluid for refrigerating cycle equipment and the refrigerating cycle equipment using the same | Chemistry; Metallurgy | 6 | Expired |
| US8519305B2 | Polymer heating element | Electricity | 5 | Active |
| US5813240A | Method for constructing a refrigerating cycle including a process of removing oxygen | Mechanical Engineering; Lighting; Heating | 4 | Expired |
| US7235219B2 | Method and apparatus for removing additives from thermoplastic resin composition | Emerging Cross-Sectional Technologies | 4 | Expired |
| US6523764B2 | Method for separating metallic from waste printed circuit boards, and dry distillation apparatus used for waste treatment | Emerging Cross-Sectional Technologies | 4 | Expired |
| US6903242B2 | Method for dehalogenation treatment of halogen containing non-combustible resin composition | Human Necessities | 1 | Expired |
| US5357017A | Macrocyclic poly-conjugated system and macrocyclic poly-conjugated composition | Chemistry; Metallurgy | 0 | Expired |
| US6429284B2 | Method for treating flame retardant resin composition | Emerging Cross-Sectional Technologies | 0 | Expired |
| US6388050B1 | Method for treating thermoplastic resin composition containing flame retardant | Emerging Cross-Sectional Technologies | 0 | Expired |
| US7435772B2 | Method and apparatus for removing additives from thermoplastic resin composition | Emerging Cross-Sectional Technologies | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.