Inventor · disambiguated record

Masao Koizumi

Also filed as: KOIZUMI MASAO

2 granted patents·80 citations·filing 2000–2002

67Inventor score

Technology areasF16K F17C

Files withHAMAI IND LTD2

Top patents by PatentIndex Score

2 records

0187US6685164B1Control valve and diaphragm for use in the control valveHAMAI IND LTD·Filed 2000·Granted Feb 3, 2004·46 cites·6 claims
0280US6910602B2Container valveHAMAI IND LTD·Filed 2002·Granted Jun 28, 2005·34 cites·3 claims

Join the waitlist — get patent alerts

Get an alert when Masao Koizumi files or is granted a new patent.

We store only your email — no account needed. See our privacy policy.

Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →