Joseph E. Roehl — 1 Patent at Environmental Technologies

Joseph E. Roehl — 1 Patent

ETEnvironmental Technologies: 1 patents #11 of 31Top 40%

Baltimore, MD: #2,553 of 4,923 inventorsTop 55%

Maryland: #19,590 of 35,612 inventorsTop 60%

Overall (All Time): #2,406,284 of 4,157,543Top 60%

Joseph E. Roehl has been granted 1 US patent while listed as an inventor at Environmental Technologies. All of these patents were granted in 1994. Joseph E. Roehl ranks #2,406,284 of 4,157,543 US inventors in our database (top 57.9%). Patent records list Joseph E. Roehl in Baltimore, MD, US.

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #	Title	Co-Inventors	Date	Approx Value ⓘ
5338931	Photoionization ion mobility spectrometer	Glenn E. Spangler, Gautam B. Patel, Alvin Dorman	1994-08-16	$230,000

Joseph E. Roehl — 1 Patent

Issued Patents All Time

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