Inventor · disambiguated record
Shizuo Yamanaka
Also filed as: YAMANAKA SHIZUO
16 granted patents·98 citations·filing 1981–2012
92Inventor score
Top patents by PatentIndex Score
16 records- 0183US8475071B2Conical nib and writing instrument incorporating the sameYAMANAKA SHIZUO·Filed 2010·Granted Jul 2, 2013·4 cites·5 claims
- 0275USD329660SWriting instrumentYAMANAKA SHIZUO·Filed 1989·Granted Sep 22, 1992·15 cites·1 claims
- 0372US8801314B2Conical NIB and writing instrument using the sameYAMANAKA SHIZUO·Filed 2011·Granted Aug 12, 2014·2 cites·7 claims
- 0460US5902064AConical penpoint method of manufactureFiled 1997·Granted May 11, 1999·15 cites·4 claims
- 0554US9233573B2Conical nib and writing instrument using the sameYAMANAKA SHIZUO·Filed 2012·Granted Jan 12, 2016·0 cites·6 claims
- 0652US5957610APenpointFiled 1996·Granted Sep 28, 1999·12 cites·20 claims
- 0751USD690363SPen nibYAMANAKA SHIZUO·Filed 2012·Granted Sep 24, 2013·7 cites·1 claims
- 0849US6652177B2Conical nib, method of manufacture of the same, and ceramic composite conical nibYAMANAKA KAZUE·Filed 2002·Granted Nov 25, 2003·7 cites·7 claims
- 0948USD692055SPen nibYAMANAKA SHIZUO·Filed 2012·Granted Oct 22, 2013·6 cites·1 claims
- 1045US5587017AProcess and apparatus for producing molten metal coated steel sheetsSUMITOMO METAL IND·Filed 1994·Granted Dec 24, 1996·10 cites·16 claims
- 1138US4386867AMultangular pen nib constructionYAMANAKA SHIZUO·Filed 1981·Granted Jun 7, 1983·6 cites·4 claims
- 1237US4986686AMultiangular penYAMANAKA SHIZUO·Filed 1989·Granted Jan 22, 1991·6 cites·6 claims
- 1335US4986684AMultiangular penYAMANAKA SHIZUO·Filed 1989·Granted Jan 22, 1991·4 cites·8 claims
- 1433US5015113AMultiangular penYAMANAKA SHIZUO·Filed 1988·Granted May 14, 1991·3 cites·1 claims
- 1532USD688306SPen nibYAMANAKA SHIZUO·Filed 2012·Granted Aug 20, 2013·1 cites·1 claims
- 1629USD686282SPen nibYAMANAKA SHIZUO·Filed 2012·Granted Jul 16, 2013·0 cites·1 claims
Join the waitlist — get patent alerts
Get an alert when Shizuo Yamanaka 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 →