Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11377841 | Junction structure of prestressed concrete (PC) column and steel beam | — | 2022-07-05 |
| 11352790 | Method of introducing prestress to beam-column joint of PC structure in triaxial compression | — | 2022-06-07 |
| 11111664 | Method of introducing prestress to beam-column joint in triaxial compression | — | 2021-09-07 |
| 10378197 | Method for jointing concrete column and iron beam | Shigeru Hyakutake, Hitoyuki Takagi | 2019-08-13 |
| 9534411 | Earthquake resisting design method on the basis of PC binding articulation construction method | — | 2017-01-03 |
| 8882944 | Method for forming rustproof film on PC strand and PC strand | Kei HIRAI, Naoki Matsubara | 2014-11-11 |
| 8833050 | Double rustproof PC strand | Kei HIRAI | 2014-09-16 |
| 8191251 | Method for forming rustproof film on a PC strand | Kei HIRAI | 2012-06-05 |