Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7735356 | Measuring apparatus and measuring method for concrete-forming materials | Ryuichi Chikamatsu, Koji Watanabe, Hisayoshi Kikkawa | 2010-06-15 |
| 7578207 | Measuring apparatus and measuring method for concrete-forming materials | Ryuichi Chikamatsu, Koji Watanabe, Hisayoshi Kikkawa | 2009-08-25 |
| 7207212 | Device and method for weighing concrete material | Ryuichi Chikamatsu, Koji Watanabe, Hisayoshi Kikkawa | 2007-04-24 |
| 7000458 | Weighing equipment for concrete material | Ryuichi Chikamatsu, Koji Watanabe | 2006-02-21 |
| 4266885 | Method of constructing a continuous cut-off wall and a core of a fill-type dam | Kazuaki Naito, Takaiki Tetekawa, Kazuhiko Higaki, Tetu Yasuoka, Hidetoshi Hosoi | 1981-05-12 |