John W. O'Brien

📍 Harrison, AR: #5 of 59 inventorsTop 9%

🗺 Arkansas: #958 of 5,804 inventorsTop 20%

Overall (All Time): #1,294,371 of 4,157,543Top 35%

Patents All Time

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #	Title	Co-Inventors	Date
5307525	Bathroom odor eliminator	—	1994-05-03
4578869	Die casting machine alignment tool	—	1986-04-01
4289259	Automatic ladler	—	1981-09-15
4220173	Time delay fluid valve	—	1980-09-02