Individual holder
CHRISTIANSEN DOUGLAS J
US·4 granted patents·13 citations·filing 2009–2013
Individually held — no corporate assignee on record.
Top patents by PatentIndex Score
4 records- 0184US8602394B2Winching apparatusCHRISTIANSEN DOUGLAS J·Filed 2011·Granted Dec 10, 2013·11 cites·22 claims
- 0250US8024867B2Tape measure calibratorCHRISTIANSEN DOUGLAS J·Filed 2009·Granted Sep 27, 2011·2 cites·13 claims
- 0344US9568308B2Multi-instrument calibration standardCHRISTIANSEN DOUGLAS J·Filed 2013·Granted Feb 14, 2017·0 cites·20 claims
- 0442US8438745B2Pass/fail tape measure calibratorCHRISTIANSEN DOUGLAS J·Filed 2011·Granted May 14, 2013·0 cites·18 claims
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