Inventor · disambiguated record

David F. Birch

Also filed as: BIRCH DAVID F

2 granted patents·5 citations·filing 2001–2003

47Inventor score

Technology areasG09B

Files withACCENT SIGNAGE SYSTEMS INC1

Top patents by PatentIndex Score

2 records

0149US6908009B2Handheld apparatus for semi-automatically feeding and inserting members into Braille signsFiled 2003·Granted Jun 21, 2005·2 cites·6 claims
0248US6537071B2Apparatus for automatically feeding and inserting members into braille signsACCENT SIGNAGE SYSTEMS INC·Filed 2001·Granted Mar 25, 2003·3 cites·10 claims

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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →