Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
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David Dronsfield — 8 Patents

PEPrinted Forms Equipment: 5 patents #1 of 3Top 35%
QFQuadient Technologies France: 1 patents #22 of 47Top 50%
NTNeopost Technologies: 1 patents #77 of 155Top 50%
Loughton, GB: #3 of 52 inventorsTop 6%
Overall (All Time): #600,572 of 4,157,543Top 15%
8 Patents All Time
David Dronsfield has been granted 8 US patents while listed as an inventor at Printed Forms Equipment. The first was granted in 1994 and the most recent in May 2024. David Dronsfield ranks #600,572 of 4,157,543 US inventors in our database (top 14.4%). Patent records list David Dronsfield in Loughton, GB.

Issued Patents All Time

Showing 1–8 of 8 patents

Patent #TitleCo-InventorsDate
11987470 Sheet collating device 2024-05-21
8453418 Document inserting apparatus Damon Smith 2013-06-04
6915184 Collator Keith Yates, Richard Stephen Maher, Damon Smith 2005-07-05
5904644 Envelope closer 1999-05-18
5487254 Apparatus for inserting material into envelopes 1996-01-30
5425533 Apparatus for assembly of a plurality of items of insert material into stacks on a conveyor 1995-06-20
5406771 Apparatus for inserting material into envelopes 1995-04-18
5327701 Apparatus for inserting material into envelopes 1994-07-12