Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7167822 | System from preparing language learning materials to teaching language, and language teaching system | — | 2007-01-23 |
| 5895777 | Petroleum additive having excellent storage stability and heat stability comprising an alkaline earth metal salt of aromatic hydroxycarboxylic acid or a sulfurized mixture thereof | Shinji Yamaoka, Jun Imai | 1999-04-20 |
| 5538650 | Process for producing mixture of sulfurized alkaline earth metal salts of salicylic acid compound and phenol | Masato Goto, Makoto Nishishita, Yoshihiro Kojima | 1996-07-23 |
| 5446202 | Over-based sulfurized alkaline earth metal phenate and process for producing the same | Makoto Nishishita, Masato Goto | 1995-08-29 |
| 5292968 | Process for producing over-based alkaline earth metal phenate | Yoshihiro Kojima, Makoto Nishishita, Shinji Yamaoka | 1994-03-08 |
| 5178781 | Process for producing over-based sulfurized alkaline earth metal phenate type detergent | Takashi Hori, Yoshihiro Kojima, Masato Goto, Hitoshi Kumagai | 1993-01-12 |
| 4902436 | Process for producing a mixture of sulfides of alkaline earth metal salts of alkylhydroxybenzoic acid and alkylphenol | Takashi Hori, Yoshihiro Kojima, Hitoshi Kumagai | 1990-02-20 |
| 4518807 | Process for the production of basic alkaline earth metal phenates | Takashi Hori, Yoshihiro Kojima | 1985-05-21 |