Inventor · disambiguated record
Takeo Obitsu
Also filed as: OBITSU TAKEO
6 granted patents·41 citations·filing 1986–1989
80Inventor score
Files withSHIN NISSO KAKO CO LTD6
Top patents by PatentIndex Score
6 records- 0161US4680598AChromogenic materials employing fluoran compoundsSHIN NISSO KAKO CO LTD·Filed 1986·Granted Jul 14, 1987·16 cites·58 claims
- 0259US4687862AFluoran compoundsSHIN NISSO KAKO CO LTD·Filed 1986·Granted Aug 18, 1987·15 cites·6 claims
- 0349US4668967AFluoran compound and color forming record materials using the sameSHIN NISSO KAKO CO LTD·Filed 1986·Granted May 26, 1987·3 cites·5 claims
- 0438US4826806AFluoran compounds and color forming recording materials using sameSHIN NISSO KAKO CO LTD·Filed 1987·Granted May 2, 1989·3 cites·10 claims
- 0532US4954631AFluoran compounds and color forming recording materials using sameSHIN NISSO KAKO CO LTD·Filed 1989·Granted Sep 4, 1990·4 cites·13 claims
- 0627US4794069ASpirobenzanthracene phthalide compounds, processes for preparing same and color forming recording materials containing said compoundsSHIN NISSO KAKO CO LTD·Filed 1987·Granted Dec 27, 1988·0 cites·19 claims
Join the waitlist — get patent alerts
Get an alert when Takeo Obitsu 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 →