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Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
DH

David Horsfall — 6 Patents

IKIkeyless: 4 patents #5 of 14Top 40%
Silsden, GB: #1 of 11 inventorsTop 10%
Overall (All Time): #779,687 of 4,157,543Top 20%
6 Patents All Time
David Horsfall has been granted 6 US patents while listed as an inventor at Ikeyless. The first was granted in 2021 and the most recent in April 2025. David Horsfall ranks #779,687 of 4,157,543 US inventors in our database (top 18.8%). Patent records list David Horsfall in Silsden, GB.

Patents per Year

Patents granted per year, 2021 to 2025Bar chart with a peak of 2 patents in 2023.peak 22021: 1 patents20212023: 2 patents20232024: 2 patents20242025: 1 patents2025

Issued Patents All Time

Showing 1–6 of 6 patents

Patent #TitleCo-InventorsDate
12276494 Systems and methods for creating duplicate keys Douglas Lawrence Robertson, Adam Pizer, Ian Smith 2025-04-15
12159498 Systems and methods for creating duplicate keys and pairing with vehicles Douglas Lawrence Robertson, Adam Pizer, Ian Smith 2024-12-03
12044522 Systems and methods for creating duplicate keys Douglas Lawrence Robertson, Adam Pizer, Ian Smith 2024-07-23
11712743 Key cutting machine with improved key holder 2023-08-01
11590589 Key clamp Polly Crowther 2023-02-28
11065697 Key cutting apparatus Polly Crowther 2021-07-20