Issued Patents All Time
Showing 26–31 of 31 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5256309 | Method of improving the quality of large amount of water, and quantity of dissolved oxygen therein | — | 1993-10-26 |
| 5227056 | Apparatus for improving the quality of a large amount of water and the quantity of dissolved oxygen therein | — | 1993-07-13 |
| 4906363 | Water aeration apparatus | Hisao Makino | 1990-03-06 |
| 4828696 | Water aeration apparatus | Hisao Makino | 1989-05-09 |
| 4752421 | Method of supplying air masses and producing jets of water | — | 1988-06-21 |
| 4702830 | Water aeration apparatus | Hisao Makino | 1987-10-27 |