Inventor

HUIZINGA DONALD D

US4 patents

⚠️ This page may combine multiple inventors who share the name “HUIZINGA DONALD D”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

BELL TELEPHONE LABOR INC

2 patents

US4416007ANov 15, 1983

Digital conferencing method and arrangement

BELL TELEPHONE LABOR INC19 citations73

US4413159ANov 1, 1983

Dial pulsing circuit

BELL TELEPHONE LABOR INC4 citations59

AT & T BELL LAB

1 patent

US4488006ADec 11, 1984

Apparatus for controlling the application of telephone line power in a telephone set

AT & T BELL LAB22 citations76

AMERICAN TELEPHONE & TELEGRAPH

1 patent

US4870679ASep 26, 1989

Repertory telephone dialer with remote billing capability

AMERICAN TELEPHONE & TELEGRAPH22 citations75