Patent · US Expired

Device for selectively depressing a telephone switch

US4912759A · kind A · utility

5Cited by
8References
17Claims
0Family size

Inventor

Key dates

Filing dateApr 10, 1989
Grant dateMar 27, 1990
Priority date—
Expiry dateApr 10, 2009

Classification

  • Technology area (CPC H)Electricity
  • CPC primaryH04M1/06
  • WIPO fieldTelecommunications
  • WIPO sectorElectrical engineering

Abstract

A device for selectively keeping the flash button of a telephone handset depressed. The device comprises a detachable telephone handset engaging member, which when secured to the handset depresses the flash button, thereby keeping the telephone off line. When the handset engaging member is detached from the handset, the flash button is released and phone calls may be made. The device is easy to operate and makes it unnecessary to use the hook switch on the telephone cradle.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.