P

Inventor

LECHNER ROBERT

AT34 patents
⚠️ This page may combine multiple inventors who share the name “LECHNER ROBERT”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

SIEMENS AG

24 patents
US4905227AFeb 27, 1990

Circuit for subscriber line interface circuits in a digital time-division multiplex communication switching center

SIEMENS AG34 citations91
US4881226ANov 14, 1989

Digital interface of an integrated subscriber line interface circuit

SIEMENS AG22 citations77
US6009085ADec 28, 1999

Arrangement for the synchronization of the radio transmission in a radiotelephone subscriber connection network

SIEMENS AG10 citations74
US5274692ADec 28, 1993

Method for testing the line connection before switching from a telephone switching center to be placed out of service to a new digital telephone switching center to be placed into service

SIEMENS AG11 citations74
US4378472AMar 29, 1983

Two to four wire hybrid circuit arrangement for a pulse code modulated time multiplex telecommunication system

SIEMENS AG19 citations74
US4327253AApr 27, 1982

Circuit arrangement for consecutively monitoring operating conditions of direct current devices

SIEMENS AG7 citations74
US4320260AMar 16, 1982

Circuit arrangement for determining the connection condition of a subscriber line in a telecommunications network

SIEMENS AG12 citations74
US4415881ANov 15, 1983

Digital-to-analog converter

SIEMENS AG11 citations73
US4720845AJan 19, 1988

Protective circuit for the overvoltage protection of a subscriber line interconnect circuit

SIEMENS AG14 citations72
US4715058ADec 22, 1987

Protective circuit for the overvoltage protection of a subscriber line interconnect circuit

SIEMENS AG11 citations72
US4468651AAug 28, 1984

Method for eliminating the zero point error in an iterative analog-digital converter

SIEMENS AG11 citations71
US5274694ADec 28, 1993

Radio communication network based on digital local exchanges

SIEMENS AG17 citations67
US4297531AOct 27, 1981

Circuit for suppressing noise influences in the evaluation of signal states on transmission lines

SIEMENS AG7 citations65
US6005875ADec 21, 1999

Public communications service with multiple access use of trunk links

SIEMENS AG4 citations63
US4301334ANov 17, 1981

Telecommunication subscriber line access circuit with ground key and insulation fault indication

SIEMENS AG3 citations63
US4284853AAug 18, 1981

Telecommunication subscriber line access circuit with ground key indication and a device for call signal generation

SIEMENS AG2 citations63
US4809258AFeb 28, 1989

Circuit arrangement for the indication of loop closure during the ringing condition

SIEMENS AG2 citations61
US5043977AAug 27, 1991

Method and a circuit arrangement for setting the subscriber line dummy impedances of programmable hybrid circuits

SIEMENS AG4 citations58
US6188893B1Feb 13, 2001

Subscriber connection net for the connection of subscriber stations to an exchange using a radio system

SIEMENS AG2 citations57
US4309766AJan 5, 1982

Arrangement for subscriber circuits utilizing digital time division multiplex telecommunication installations and particularly for PCM local exchanges

SIEMENS AG3 citations54
US4336424AJun 22, 1982

Circuit arrangement for monitoring operating conditions of direct current devices

SIEMENS AG1 citations52
US4893309AJan 9, 1990

Digital interface between at least two subscriber line interface circuits and a processing unit

SIEMENS AG1 citations47
US4852159AJul 25, 1989

Circuit arrangement for a module in the exchange of a digital TDM telecommunications network

SIEMENS AG0 citations42
US4858226AAug 15, 1989

Method for the operation of an interface circuit between a central portion and local portions of a subscriber termination module of a digital time multiplex telecommunications network

SIEMENS AG0 citations39

ROHR INC

4 patents

CNBM RES INSTITUTE FOR ADVANCED GLASS MATERIALS GROUP CO LTD

2 patents

EVONIK DEGUSSA GMBH

1 patent

ADVANCED MICRO DEVICES INC

1 patent

CNBM BENGBU DESIGN & RES INSTITUTE FOR GLASS INDUSTRY

1 patent

SAINT GOBAIN

1 patent