Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8936048 | Copper and zinc elution preventing method of copper-alloy-made plumbing instrument including valve and pipe joint, copper-alloy-made plumbing instrument using the method, and film-forming agent | — | 2015-01-20 |
| 8221556 | Copper alloy plumbing hardware, such as valves and tube couplings, and the treatment method for reducing elution of lead | — | 2012-07-17 |
| 8182879 | Method for preventing elution of nickel from water-contact instrument of copper alloy by formation of a protective film | Teruhiko Horigome | 2012-05-22 |
| 7368019 | Method for preventing elution of lead and/or nickel from copper alloy piping material such as valve or pipe joint and copper alloy piping material, and fluid for use in cleaning piping material | — | 2008-05-06 |