Issued Patents All Time
Showing 26–30 of 30 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5268105 | Method for dehydrating human-waste disposal materials | Minoru Takewaki | 1993-12-07 |
| 4323458 | Process for removing heavy-metal ions from aqueous solution | Masahide Hirai, Tsutomu Sakaida | 1982-04-06 |
| 4266045 | Etherified phenolic chelate resin, process for its production, and method for adsorption treatment | Masahide Hirai, Tsutomu Sakaida | 1981-05-05 |
| 4250031 | Phenolic chelate resin and method of adsorption treatment | Masahide Hirai, Masahiro Kazigase | 1981-02-10 |
| 4197391 | Phenolic chelate resin and method of adsorption treatment | Masahide Hirai, Masahiro Kazigase | 1980-04-08 |