Clifton D. Crutchfield

📍 Tucson, AZ: #1,845 of 6,004 inventorsTop 35%

🗺 Arizona: #10,057 of 32,909 inventorsTop 35%

Overall (All Time): #1,545,473 of 4,157,543Top 40%

Patents All Time

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #	Title	Co-Inventors	Date
8528559	Respirator fit-testing apparatus and method	—	2013-09-10
8011368	Respirator fit-testing apparatus and method	—	2011-09-06
4765325	Method and apparatus for determining respirator face mask fit	—	1988-08-23