Inventor · disambiguated record
Kouichi Takayama
Also filed as: TAKAYAMA KOUICHI
4 granted patents·1 pending application·15 citations·filing 2003–2022
62Inventor score
Top patents by PatentIndex Score
5 records- 0188US8430591B1Ballpoint pen tip and ballpoint penOKAMOTO KEISHI·Filed 2012·Granted Apr 30, 2013·15 cites·12 claims
- 0262US12220937B2Writing ball, method for manufacturing writing ball, and ballpoint pen with writing ballPILOT CORPORATION KK·Filed 2022·Granted Feb 11, 2025·0 cites·12 claims
- 0348US10087337B2Oil-based ball-point pen refill, oil-based ball-point pen, and oil-based ball-point pen ink compositionPILOT CORPORATION KK·Filed 2014·Granted Oct 2, 2018·0 cites·8 claims
- 0436US9346313B2Ballpoint pen tip and ballpoint pen using the sameTAKAYAMA KOUICHI·Filed 2011·Granted May 24, 2016·0 cites·10 claims
- 0529US2006016291A1Niobium powder, process for producing the same and solid electrolytic capacitor therefromKATAOKA EIJI·Filed 2003·Application pending·0 cites
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →