Patent · US Expired

Telephone apparatus

US6192231A · kind A · utility

46Cited by
31References
18Claims
0Family size

Assignee

Inventors

Key dates

Filing dateMay 5, 1998
Grant dateFeb 20, 2001
Priority date—
Expiry dateMay 5, 2018

Classification

  • Technology area (CPC H)Electricity
  • CPC primaryH04M1/57
  • WIPO fieldTelecommunications
  • WIPO sectorElectrical engineering

Abstract

RACTS OF JAPAN, vol. 018, No. 428, 10 Aug. 1994 & JP-A-06 133058. PATENT

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