Assignee
ROLM CORP
US23 patents
Top patents by PatentIndex Score
US4163124AJul 31, 1979
Finite storage-time queue
ROLM CORP94 citations96
US4475235AOct 2, 1984
Signature verification sensor
ROLM CORP87 citations93
US4320520AMar 16, 1982
Transmitter/receiver for use on common cable communications system such as ethernet
ROLM CORP44 citations93
US4313036AJan 26, 1982
Distributed CBX system employing packet network
ROLM CORP116 citations92
US4187466AFeb 5, 1980
Signal injection technique
ROLM CORP36 citations92
US3999129ADec 21, 1976
Method and apparatus for error reduction in digital information transmission systems
ROLM CORP51 citations92
US4627050ADec 2, 1986
Time division multiplexed computerized branch exchange
ROLM CORP29 citations91
US4485470ANov 27, 1984
Data line interface for a time-division multiplexing (TDM) bus
ROLM CORP117 citations89
US4600982AJul 15, 1986
Low power consuming AC to DC converter
ROLM CORP13 citations74
US4445048AApr 24, 1984
High speed ribbon cable bus
ROLM CORP17 citations74
US4411004AOct 18, 1983
Inductively coupled sensing circuit and priority system
ROLM CORP13 citations74
US4494229AJan 15, 1985
Interconnecting apparatus for a distributed switching telephone system
ROLM CORP12 citations73
US4253000AFeb 24, 1981
Method and system for reducing conference bridge oscillations
ROLM CORP7 citations73
US4061887ADec 6, 1977
Key telephone adapter for electronic telephone switching system
ROLM CORP16 citations73
US5070439ADec 3, 1991
DC to DC converter apparatus employing push-pull oscillators
ROLM CORP16 citations71
US4642805AFeb 10, 1987
Digital link for telephone station sets
ROLM CORP17 citations71
US4546388AOct 8, 1985
Power supply for CRT terminal
ROLM CORP12 citations70
US3985966AOct 12, 1976
Method and apparatus for generating digital dual frequency signals
ROLM CORP10 citations70
US4313037AJan 26, 1982
Telephone station set with improved flash signalling
ROLM CORP7 citations69
US4803699AFeb 7, 1989
Bus apparatus with a plurality of transmitters
ROLM CORP5 citations63
USD259639SJun 23, 1981
Telephone desk set
ROLM CORP6 citations62
US4459558AJul 10, 1984
Phase locked loop having infinite gain at zero phase error
ROLM CORP4 citations60
US4191862AMar 4, 1980
Dual frequency tone decoder
ROLM CORP6 citations57