Individual holder
CRUTCHFIELD CLIFTON D
3 granted patents·107 citations·filing 1986–2011
Individually held — no corporate assignee on record.
Technology mixA62B3
Top patents by PatentIndex Score
3 records- 0190US8528559B2Respirator fit-testing apparatus and methodCRUTCHFIELD CLIFTON D·Filed 2011·Granted Sep 10, 2013·22 cites·18 claims
- 0277US8011368B2Respirator fit-testing apparatus and methodCRUTCHFIELD CLIFTON D·Filed 2004·Granted Sep 6, 2011·30 cites·14 claims
- 0372US4765325AMethod and apparatus for determining respirator face mask fitCRUTCHFIELD CLIFTON D·Filed 1986·Granted Aug 23, 1988·55 cites·19 claims
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Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →