Rubein V. Johnson

📍 Muskogee, OK: #14 of 95 inventorsTop 15%

🗺 Oklahoma: #2,630 of 12,736 inventorsTop 25%

Overall (All Time): #1,308,494 of 4,157,543Top 35%

Patents All Time

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #	Title	Co-Inventors	Date
4442917	Vented acoustic ear mold for hearing aids	—	1984-04-17
4407389	Vented acoustic ear mold for hearing aids	—	1983-10-04
4311206	Hearing aid ear mold with improved discrimination	—	1982-01-19
4231445	Acoustic lens speaker cabinet	—	1980-11-04