Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6386808 | Structure of internal thread portion for preventing looseness and method of producing the same | Keiji Nomura | 2002-05-14 |
| 6364588 | Nut having corrugated thread | Keiji Nomura | 2002-04-02 |
| 5935844 | Porous cellulose carrier for immobilizing microorganisms to convert nitrogen compounds | Masatoshi Matsumura | 1999-08-10 |
| 5753110 | Biochemical reactor of liquid current type, groundwater and wastewater purifying system equipped therewith, and liquid transport-stirring apparatus that employs the transport means used in said reactor and system | Masatoshi Matsumura, Yoshimi Imaida | 1998-05-19 |