Inventor · disambiguated record
Douglas Leon Birch
Also filed as: BIRCH DOUGLAS · BIRCH DOUGLAS L · BIRCH DOUGLAS LEON
3 granted patents·1 pending application·211 citations·filing 2000–2017
71Inventor score
Top patents by PatentIndex Score
4 records- 0190US6993502B1Transaction tax collection system and methodCCH INC·Filed 2000·Granted Jan 31, 2006·206 cites·22 claims
- 0255US8190988B2Form bundlingECKELMAN HANS MICAH·Filed 2007·Granted May 29, 2012·4 cites·20 claims
- 0348US10384500B2Hitch cushion systemBIRCH DOUGLAS·Filed 2017·Granted Aug 20, 2019·1 cites·5 claims
- 0434US2012221934A1Form bundlingECKELMAN HANS MICAH·Filed 2012·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →