John H. Hirt

HE Hirt Combustion Engineers: 3 patents #1 of 3Top 35%

📍 Fullerton, CA: #285 of 1,038 inventorsTop 30%

🗺 California: #149,087 of 386,348 inventorsTop 40%

Overall (All Time): #1,668,840 of 4,157,543Top 45%

Patents All Time

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #	Title	Co-Inventors	Date
4960166	Rotary heat wheel structure and method	—	1990-10-02
4680004	Method and apparatus for controlling gasoline vapor emissions	—	1987-07-14
4292020	Method and apparatus for abatement of gasoline vapor emissions	—	1981-09-29