John W. Plifka

📍 Minneapolis, MN: #1,962 of 6,114 inventorsTop 35%

🗺 Minnesota: #19,064 of 52,454 inventorsTop 40%

Overall (All Time): #1,586,994 of 4,157,543Top 40%

Patents All Time

Issued Patents All Time

Showing 1–3 of 3 patents

Patent #	Title	Co-Inventors	Date
D540927	Toilet seat mounted ventilator intake	—	2007-04-17
4538827	Ball hitch trailer lock	—	1985-09-03
4419872	Locking device for skiers use	—	1983-12-13