Inventor · disambiguated record
Masayasu Koyama
Also filed as: KOYAMA MASAYASU
9 granted patents·1 pending application·628 citations·filing 1982–2004
92Inventor score
Files withTOYO SEIKAN KAISHA LTD10
Top patents by PatentIndex Score
10 records- 0198US5153038APlastic multi-layer vesselTOYO SEIKAN KAISHA LTD·Filed 1989·Granted Oct 6, 1992·156 cites·24 claims
- 0297US5542557AContainer closure wth liner and method of producing the sameTOYO SEIKAN KAISHA LTD·Filed 1994·Granted Aug 6, 1996·145 cites·4 claims
- 0392US5381914AContainer closure with linerTOYO SEIKAN KAISHA LTD·Filed 1992·Granted Jan 17, 1995·89 cites·3 claims
- 0492US5274024AOxygen-absorbing resin composition containing water-absorbing polymer, olefin resin and oxygen scavengerTOYO SEIKAN KAISHA LTD·Filed 1992·Granted Dec 28, 1993·64 cites·3 claims
- 0577US5246753APlastic multilayer vesselTOYO SEIKAN KAISHA LTD·Filed 1990·Granted Sep 21, 1993·50 cites·27 claims
- 0677US5213227AContainer having excellent preservability for content and heat-sealabilityTOYO SEIKAN KAISHA LTD·Filed 1991·Granted May 25, 1993·61 cites·12 claims
- 0765US4463116AEasily openable liner for vessel closuresTOYO SEIKAN KAISHA LTD·Filed 1982·Granted Jul 31, 1984·18 cites·6 claims
- 0863US6964796B1Oxygen-absorbing resin composition and packaging container, packaging material, cap or liner material having oxygen absorbabilityTOYO SEIKAN KAISHA LTD·Filed 1999·Granted Nov 15, 2005·24 cites·9 claims
- 0951US5800887AOxygen-absorbing containerTOYO SEIKAN KAISHA LTD·Filed 1995·Granted Sep 1, 1998·21 cites·7 claims
- 1051US2005079306A1Oxygen-absorbing resin composition and packaging container, packaging material, cap or liner material having oxygen absorbabilityTOYO SEIKAN KAISHA LTD·Filed 2004·Application pending·0 cites
Join the waitlist — get patent alerts
Get an alert when Masayasu Koyama 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 →