Inventor · disambiguated record
Thomas Tsoi Hei Ma
Also filed as: HEI MA THOMAS TSOI · MA THOMAS TSOI-HEI
4 granted patents·169 citations·filing 1997–1999
78Inventor score
Top patents by PatentIndex Score
4 records- 0198US6189516B1Fuel vapor extraction systemFORD GLOBAL TECH INC·Filed 1998·Granted Feb 20, 2001·142 cites·10 claims
- 0247US6148792ADirect injection spark ignition engineFORD GLOBAL TECH INC·Filed 1997·Granted Nov 21, 2000·12 cites·7 claims
- 0338US6244246B1Stratified charge engine with 2 sparks plugsFORD GLOBAL TECH INC·Filed 1999·Granted Jun 12, 2001·9 cites·6 claims
- 0429US6655128B1Purging of an NOx trapFORD GLOBAL TECH LLC·Filed 1998·Granted Dec 2, 2003·6 cites·16 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →