David Johnson

AR Arcair: 1 patents #2 of 7Top 30%

📍 Modesto, CA: #5 of 37 inventorsTop 15%

🗺 California: #676 of 10,592 inventorsTop 7%

Overall (1989): #29,525 of 140,708Top 25%

Patents 1989

Issued Patents 1989

Showing 1–2 of 2 patents

Patent #	Title	Co-Inventors	Date
D305202	Multi-vial level attachment for hand-held drills	—	1989-12-26
4868504	Apparatus and method for locating metal objects and minerals in the ground with return of energy from transmitter coil to power supply	—	1989-09-19