Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6388038 | Method for producing polycarboxylic acid for cement dispersant and cement composition | Tsuyoshi Hirata, Tsutomu Yuasa, Katsuhisa Shiote, Koichiro Nagare | 2002-05-14 |
| 6174980 | Cement dispersant, method for producing polycarboxylic acid for cement dispersant and cement composition | Tsuyoshi Hirata, Tsutomu Yuasa, Katsuhisa Shiote, Koichiro Nagare | 2001-01-16 |
| 5912284 | Cement additive, its production process and use | Tsuyoshi Hirata, Tsutomu Yuasa, Katsuhisa Shiote, Koichiro Nagare | 1999-06-15 |
| 4910552 | Automatic document feeder for electrophotographic copying machine with a drum for supporting a document | Haruyoshi Migita, Hirokazu Matsuura | 1990-03-20 |