Inventor · disambiguated record
Stephen Donald Langdon
Also filed as: LANGDON STEPHEN · LANGDON STEPHEN DONALD
9 granted patents·1 pending application·139 citations·filing 2017–2023
87Inventor score
Top patents by PatentIndex Score
10 records- 0197US9958232B1Mechanism for drawing, cocking, and triggering a crossbowEXCALIBUR CROSSBOW INC·Filed 2017·Granted May 1, 2018·76 cites·25 claims
- 0295US11015892B1Anti-dry-fire mechanism for a crossbowEXCALIBUR CROSSBOW INC·Filed 2020·Granted May 25, 2021·37 cites·19 claims
- 0387US11385033B2Rear arrow nock with retentionEXCALIBUR CROSSBOW INC·Filed 2021·Granted Jul 12, 2022·5 cites·14 claims
- 0484US11143482B2Multiple-shot crossbowEXCALIBUR CROSSBOW INC·Filed 2020·Granted Oct 12, 2021·2 cites·22 claims
- 0583US10041755B1Safety wrist strap for a crossbow crank handleEXCALIBUR CROSSBOW INC·Filed 2017·Granted Aug 7, 2018·12 cites·21 claims
- 0674US11629943B2Crossbow having trigger mechanism with arrow retentionEXCALIBUR CROSSBOW INC·Filed 2022·Granted Apr 18, 2023·1 cites·18 claims
- 0772US10830553B2Crossbow with detachable limb assemblyEXCALIBUR CROSSBOW INC·Filed 2018·Granted Nov 10, 2020·6 cites·21 claims
- 0869US12130114B2CrossbowEXCALIBUR CROSSBOW LLC·Filed 2023·Granted Oct 29, 2024·0 cites·12 claims
- 0957US2023251067A1Crossbow having trigger mechanism with arrow retentionEXCALIBUR CROSSBOW LLC·Filed 2023·Application pending·0 cites
- 1052US11768051B2Trigger assembly for a crossbowEXCALIBUR CROSSBOW INC·Filed 2021·Granted Sep 26, 2023·0 cites·12 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →