Assignee
ROLM CO
US42 patents
Top patents by PatentIndex Score
US5276731AJan 4, 1994
Method and apparatus for handling incoming telephone calls
ROLM CO454 citations97
US5452347ASep 19, 1995
Dual-line telephone bridging device that gives remote telephones access to communications features
ROLM CO103 citations95
US5287352AFeb 15, 1994
Method and apparatus to reduce register overhead in a serial digital interface
ROLM CO137 citations95
US5274696ADec 28, 1993
Protocol for transmitting messages in a network
ROLM CO62 citations95
US5502761AMar 26, 1996
Apparatus and method for relaying calling information to a pager or alternate telephone
ROLM CO174 citations94
US5287498AFeb 15, 1994
Message transmitting system wherein recipient site is determined using information concerning the relationship between the sender and recipient sites
ROLM CO97 citations93
US5241586AAug 31, 1993
Voice and text annotation of a call log database
ROLM CO71 citations93
US5349640ASep 20, 1994
Option bus adapter
ROLM CO67 citations92
US5268957ADec 7, 1993
Automatic call-back "camp-on" service for communication systems
ROLM CO103 citations92
USD340059SOct 5, 1993
Interface to a telephone set
ROLM CO30 citations92
US5563881AOct 8, 1996
Multihop distribution lists
ROLM CO39 citations91
US5561703AOct 1, 1996
System and method for integration of a paging server into a private branch exchange environment
ROLM CO236 citations91
US5594781AJan 14, 1997
Mobile telephone connection transfer
ROLM CO56 citations90
US5524243AJun 4, 1996
Parallel programming of field programmable gate array devices
ROLM CO33 citations89
US5430730AJul 4, 1995
Method for building a sub-network in a distributed voice messaging system
ROLM CO124 citations88
US5278897AJan 11, 1994
Smart internodal transfer for subscriber access in multinode voice messaging systems
ROLM CO35 citations88
US5572698ANov 5, 1996
System and method for allocating memory resources where the category of a memory resource determines where on a circular stack a pointer to the memory resource is placed
ROLM CO29 citations85
US5440616AAug 8, 1995
Method and apparatus for interconnecting a messaging system and a private branch exchange
ROLM CO31 citations85
US5231375AJul 27, 1993
Apparatus and method for detecting theft of electronic equipment
ROLM CO46 citations85
US5278976AJan 11, 1994
Method for detecting infinite loops by setting a flag indicating execution of an idle task having lower priority than executing application tasks
ROLM CO51 citations83
USD340057SOct 5, 1993
Add-on console for a telephone set
ROLM CO17 citations81
USD340058SOct 5, 1993
Interface to a telephone set
ROLM CO11 citations73
USD340054SOct 5, 1993
Telephone set
ROLM CO6 citations73
US5425124AJun 13, 1995
Lightpipe providing wide angle output
ROLM CO12 citations72
USD346384SApr 26, 1994
Telephone set
ROLM CO11 citations72
US5249186ASep 28, 1993
Apparatus for detecting the start of frame in bipolar transmission systems
ROLM CO9 citations72
US5239453AAug 24, 1993
DC to DC converter employing a free-running single stage blocking oscillator
ROLM CO12 citations72
US5222102AJun 22, 1993
Digital phased locked loop apparatus for bipolar transmission systems
ROLM CO7 citations72
US5345495ASep 6, 1994
Data diagnostics with leds on the face of a telephone
ROLM CO11 citations71
US5473672ADec 5, 1995
Inband messaging system interface of a PBX
ROLM CO12 citations70
USD346385SApr 26, 1994
Telephone set
ROLM CO6 citations69
US5263083ANov 16, 1993
Method and apparatus for sharing speakerphone processor among multiple users
ROLM CO8 citations69
US5359648AOct 25, 1994
Escape sequence using monitoring of control signal states
ROLM CO10 citations68
US5440262AAug 8, 1995
High-efficiency Ring/MWL generator
ROLM CO14 citations67
US5345589ASep 6, 1994
Centralized monitoring of activity in a distributed processing system
ROLM CO15 citations65
US5251256AOct 5, 1993
Independent hysteresis apparatus for tone detection
ROLM CO10 citations64
USD345979SApr 12, 1994
Telephone set
ROLM CO2 citations62
US5559964ASep 24, 1996
Cable connector keying
ROLM CO4 citations54
US5339360AAug 16, 1994
Method of synchronizing LEDS between a digital telephone and remote options
ROLM CO3 citations51
USD345978SApr 12, 1994
Telephone set
ROLM CO1 citations51
US5287399AFeb 15, 1994
Method and apparatus for processing downlink digital voice data
ROLM CO1 citations50
US5283893AFeb 1, 1994
Method for sorting objects in a sequentially addressed array
ROLM CO4 citations45