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 patentsUS4905227AFeb 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 patentsUS12263652B2Apr 1, 2025
Heat shield with coil recess for induction welding
ROHR INC0 citations61
US12441066B2Oct 14, 2025
Method and system for welding thermoplastic panels
ROHR INC0 citations50
US12420491B2Sep 23, 2025
Inductive welding assembly and method using conductive heat transfer strip
ROHR INC0 citations50
US11760036B2Sep 19, 2023
Systems and methods for induction welding
ROHR INC0 citations49