Inventor · disambiguated record
Derek Ronald Gramstad
Also filed as: GRAMSTAD DEREK · GRAMSTAD DEREK RONALD
7 granted patents·1 pending application·67 citations·filing 2010–2017
85Inventor score
Top patents by PatentIndex Score
8 records- 0189US8418404B2Window with opening control mechanismGRAMSTAD DEREK·Filed 2011·Granted Apr 16, 2013·28 cites·26 claims
- 0285US8813424B2Casement and awning window opening limit deviceTRUTH HARDWARE CORP·Filed 2013·Granted Aug 26, 2014·9 cites·20 claims
- 0381US8505240B2Casement and awning window opening limit deviceNGUYEN NGHI CHRISTOPHER·Filed 2010·Granted Aug 13, 2013·10 cites·16 claims
- 0480US10221607B2Integrated casement window operator and lockTRUTH HARDWARE CORP·Filed 2017·Granted Mar 5, 2019·6 cites·18 claims
- 0580US9617782B2Self-sealing butt hingeTRUTH HARDWARE CORP·Filed 2015·Granted Apr 11, 2017·8 cites·23 claims
- 0667US9428945B2Casement and awning window opening limit deviceTRUTH HARDWARE CORP·Filed 2014·Granted Aug 30, 2016·3 cites·6 claims
- 0759US9181746B2Low profile high performance casement and awning window keeperTRUTH HARDWARE CORP·Filed 2014·Granted Nov 10, 2015·3 cites·14 claims
- 0851US2016130847A1Around-the-corner multi-point window lock mechanism for casement and awning windowsTRUTH HARDWARE CORP·Filed 2014·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →