RA

Russell J. Apfel

AM AMD: 2 patents #88 of 389Top 25%
🗺 Texas: #541 of 5,943 inventorsTop 10%
Overall (1997): #25,282 of 185,788Top 15%
2
Patents 1997

Issued Patents 1997

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
5694465 Integrated ringer for short telephone lines — 1997-12-02
5619567 Variable DC feed characteristic in a subscriber line interface circuit — 1997-04-08