P

Inventor

ZELLER JR DAVID A

US6 patents
⚠️ This page may combine multiple inventors who share the name “ZELLER JR DAVID A”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

ALCATEL USA CORP

3 patents
US4821319AApr 11, 1989

Single line telephone communication system

ALCATEL USA CORP141 citations96
US4782480ANov 1, 1988

Telephone line access apparatus

ALCATEL USA CORP5 citations61
US4750170AJun 7, 1988

Line access apparatus for in-band communication

ALCATEL USA CORP1 citations51

ITT

3 patents
US4668902AMay 26, 1987

Apparatus for optimizing the charging of a rechargeable battery

ITT56 citations93
US4654869AMar 31, 1987

Information collecting and forwarding apparatus

ITT17 citations70
US4646342AFeb 24, 1987

Test trunk access controller

ITT13 citations70