Assignee
POST OFFICE
GB154 patents
Top patents by PatentIndex Score
US4452506AJun 5, 1984
Coupling of dielectric optical waveguides
POST OFFICE63 citations95
US4346601AAug 31, 1982
Testing glass fibres
POST OFFICE88 citations95
US4125768ANov 14, 1978
Apparatus for launching or detecting waves of selected modes in an optical dielectric waveguide
POST OFFICE209 citations95
US4278835AJul 14, 1981
Submarine communication cable including optical fibres within an electrically conductive tube
POST OFFICE66 citations94
US4456331AJun 26, 1984
Improved communications cable with lines of weakness
POST OFFICE78 citations91
US4873662AOct 10, 1989
Information handling system and terminal apparatus therefor
POST OFFICE90 citations90
US4124825ANov 7, 1978
Signal level stabilizer
POST OFFICE37 citations90
US4237339ADec 2, 1980
Audio teleconferencing
POST OFFICE87 citations89
US4500116AFeb 19, 1985
Identification matter
POST OFFICE78 citations87
US6227378B1May 8, 2001
Sorting system for groups of items having recirculation
POST OFFICE75 citations86
US5998752ADec 7, 1999
Sorting system
POST OFFICE21 citations86
US4509635AApr 9, 1985
Sorting system
POST OFFICE111 citations86
US4309671AJan 5, 1982
Control apparatus
POST OFFICE77 citations86
US4168212ASep 18, 1979
Determining semiconductor characteristic
POST OFFICE44 citations86
US4038489AJul 26, 1977
Cables
POST OFFICE110 citations86
US4027331AMay 31, 1977
Digital television system
POST OFFICE124 citations86
US4128140ADec 5, 1978
Apparatus for recycling engine lubricating oil
POST OFFICE57 citations85
US3970795AJul 20, 1976
Measurement of noise in a communication channel
POST OFFICE48 citations85
US4456789AJun 26, 1984
Audio teleconferencing
POST OFFICE33 citations84
US4262283AApr 14, 1981
System for transmitting alarm information over telephone lines
POST OFFICE32 citations83
US4193121AMar 11, 1980
Information handling apparatus having multiple ports distributed around shifting register rings
POST OFFICE38 citations83
US4166985ASep 4, 1979
Injection laser stabilization
POST OFFICE30 citations82
US4125658ANov 14, 1978
Apparatus for use in drawing or marking graphic characters on a surface
POST OFFICE53 citations82
US3982075ASep 21, 1976
Synchronization system for time division multiple access relay communications system
POST OFFICE36 citations82
US5010998AApr 30, 1991
Diverter
POST OFFICE34 citations81
US4497536AFeb 5, 1985
Coupling of dielectric optical waveguides
POST OFFICE24 citations81
US4417387ANov 29, 1983
Gold metallization in semiconductor devices
POST OFFICE34 citations81
US4209773AJun 24, 1980
Code converters
POST OFFICE25 citations81
US4074228AFeb 14, 1978
Error correction of digital signals
POST OFFICE32 citations81
US4060138ANov 29, 1977
Vibratory tools
POST OFFICE32 citations81
US5550913AAug 27, 1996
Network terminating unit for connecting analog and digital communication systems to a digital network
POST OFFICE22 citations80
US4312566AJan 26, 1982
Dielectric optical waveguide cables
POST OFFICE23 citations80
US4154783AMay 15, 1979
Process for producing dielectric optical waveguides
POST OFFICE27 citations80
US4127370ANov 28, 1978
Apparatus for forming dielectric optical waveguides
POST OFFICE26 citations80
US4410567AOct 18, 1983
Optical fibres and coatings therefor
POST OFFICE19 citations79
US4181515AJan 1, 1980
Method of making dielectric optical waveguides
POST OFFICE25 citations79
US4151030AApr 24, 1979
Method for jointing of dielectric optical waveguides
POST OFFICE26 citations79
US4147997AApr 3, 1979
Active filters utilizing networks of resistors and negative impedance converters
POST OFFICE21 citations78
US4249043AFeb 3, 1981
Electret transducer backplate, electret transducer and method of making an electret transducer
POST OFFICE27 citations77
US4203009AMay 13, 1980
Unbalanced/balanced converter circuits
POST OFFICE22 citations77
US4102717AJul 25, 1978
Dielectric optical waveguide couplings
POST OFFICE25 citations77
US3999835ADec 28, 1976
Dielectric optical waveguides
POST OFFICE22 citations77
US3957342AMay 18, 1976
Sodium borosilicate glasses for dielectric optical waveguides
POST OFFICE30 citations77
US4139812AFeb 13, 1979
Battery charging apparatus
POST OFFICE26 citations75
US4040807AAug 9, 1977
Drawing dielectric optical waveguides
POST OFFICE25 citations75
US4967857ANov 6, 1990
Weighing apparatus
POST OFFICE20 citations74
US4036419AJul 19, 1977
Severing apparatus
POST OFFICE26 citations73
US4028207AJun 7, 1977
Measuring arrangements
POST OFFICE25 citations73
US4308503ADec 29, 1981
Phase shift keyed demodulator using recovered carrier with controlled phase offset
POST OFFICE19 citations72
US4319902AMar 16, 1982
Joining optical fiber end parts
POST OFFICE12 citations71
Showing the top 50 of 154 patents by PatentIndex Score.