Inventor · disambiguated record
Nobuo Matsubara
Also filed as: MATSUBARA NOBUO
3 granted patents·73 citations·filing 1993–1997
73Inventor score
Files withPILOT INK CO LTD3
Top patents by PatentIndex Score
3 records- 0185US5466283AAqueous ink composition for writing instrumentPILOT INK CO LTD·Filed 1993·Granted Nov 14, 1995·56 cites·4 claims
- 0254US5904432ABallpoint pen tip, manufacturing method therefor, and ballpoint pen using the samePILOT INK CO LTD·Filed 1997·Granted May 18, 1999·11 cites·4 claims
- 0343US5899625ABallpoint pen tipPILOT INK CO LTD·Filed 1997·Granted May 4, 1999·6 cites·19 claims
Join the waitlist — get patent alerts
Get an alert when Nobuo Matsubara 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 →