Inventor · disambiguated record
Derek Firth
Also filed as: FIRTH DEREK · FIRTH DEREK A
3 granted patents·86 citations·filing 1989–1998
73Inventor score
Top patents by PatentIndex Score
3 records- 0183US5018300AHanging basket linerCHIU MARTIN T·Filed 1989·Granted May 28, 1991·66 cites·9 claims
- 0255US5766648ARoad transportable segmental concrete railroad tie long-line production systemCXT INC·Filed 1996·Granted Jun 16, 1998·11 cites·16 claims
- 0348US6059199ARoad transportable segmental concrete railroad tie long-line production systemCXT INC·Filed 1998·Granted May 9, 2000·9 cites·11 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →