Inventor · disambiguated record
Er-Chang Rao
Also filed as: RAO ER-CHANG
1 granted patent·13 citations·filing 1989–1989
36Inventor score
Technology areasA61P
Files withTAISHO PHARMACEUTICAL CO LTD1
Top patents by PatentIndex Score
1 recordJoin the waitlist — get patent alerts
Get an alert when Er-Chang Rao 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 →