Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
Home › Arrangement for obtaining information about abandoned calls

Arrangement for obtaining information about abandoned calls

US Patent 4924491 · Granted May 8, 1990

Estimated economic value: $17,995,000 ⓘ

Assignee

Inventors

View full patent text on Google Patents →

More Patents by These Inventors

Fuel transfer adapters2021
Automated financial instrument processing system1998
Call-load-control arrangement for an emergency-call-answering center1993
PBX integrity arrangement for maintaining the functional integrity of PBX commun1987
Automatic call coverage for unattended PBX stations1987
PBX security system for monitoring security guard tours1987
Methods and apparatus for providing enhanced announcements in a telephone system1984