Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6352578 | Air cleaning filter, process for preparing the same, and high-level cleaner | Katsumi Sato, Hideto Takahashi, Takao Okada | 2002-03-05 |
| 6146451 | Air-cleaning filter, method of producing the same, and high-level cleaning device | Hideto Takahashi, Katsumi Sato | 2000-11-14 |
| 6120584 | Air cleaning apparatus, air filter and method for manufacturing the same | Katsumi Sato, Hideto Takahashi, Takao Okada | 2000-09-19 |
| 5882938 | Apparatus and method for evaluating contamination caused by organic substances deposited on substrate surface | Hideto Takahashi, Katsumi Sato | 1999-03-16 |
| 5798455 | Storehouse for use in storage of clean materials | Hideto Takahashi, Katsumi Sato | 1998-08-25 |
| 5057966 | Apparatus for removing static electricity from charged articles existing in clean space | Takanori Yoshida, Takao Okada | 1991-10-15 |
| 5047892 | Apparatus for removing static electricity from charged articles existing in clean space | Takanori Yoshida, Takao Okada | 1991-09-10 |