Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Circuit arrangement and process for producing conference connections between three conference parties in a PCM time multiplex switching system

Circuit arrangement and process for producing conference connections between three conference parties in a PCM time multiplex switching system

US Patent 4190744 · Granted Feb 26, 1980

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Clasp for beaded chains1997
Configuration for demountable wheel rim flange/split lockring assemblies1993
X-ray image intensifier with electron optics coating1991
X-ray image intensifier with conductive-coat electrodes on insulated metal sidew1990
Locking configuration for a wheel rim flange retaining ring1987
Foldable mast assembly1981