Patent · US Expired

Electrostatic discharge protection device

US4868876A · kind A · utility

3Cited by

10References

10Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Kurt Schiller · Mering, DE
Johann Luger · Munich, DE
Hans Schierl · Ebersberg, DE
Heinrich Kallhardt · Munich, DE

Key dates

Filing date	May 20, 1987
Grant date	Sep 19, 1989
Priority date	—
Expiry date	May 20, 2007

Classification

Technology area (CPC H)Electricity
CPC primaryH04M1/03
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

An electrically conductive network which, at one end, has a low-resistance connection with a user's hand and, at the other end, has a high-resistance connection with ground. This protects electrical equipment such as a telephone keyset from electrostatic discharge and also protects the user from unpleasantly high discharge currents.

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