Inventor
HIROTA AKIRA
44 patents
⚠️ This page may combine multiple inventors who share the name “HIROTA AKIRA”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
VICTOR COMPANY OF JAPAN
34 patentsUS4536795AAug 20, 1985
Video memory device
VICTOR COMPANY OF JAPAN31 citations92
US4682251AJul 21, 1987
Video signal reproducing apparatus having a noise reduction circuit
VICTOR COMPANY OF JAPAN22 citations82
US4178606ADec 11, 1979
Color video signal recording and/or reproducing system
VICTOR COMPANY OF JAPAN23 citations82
US4246615AJan 20, 1981
System for recording and/or reproducing an audio signal which has been converted into a digital signal
VICTOR COMPANY OF JAPAN23 citations78
US4682250AJul 21, 1987
Apparatus for recording a video signal sampled at frequency fs and reproducing the video signal as a signal essentially sampled at frequency 2fs
VICTOR COMPANY OF JAPAN7 citations74
US4626927ADec 2, 1986
Recording and reproducing apparatus for recording and reproducing a carrier chrominance signal with pre-emphasis and de-emphasis
VICTOR COMPANY OF JAPAN17 citations74
US4587576AMay 6, 1986
Video signal processing apparatus with pre-emphasis and de-emphasis for use in a recording and reproducing system
VICTOR COMPANY OF JAPAN19 citations74
US4563704AJan 7, 1986
Noise reduction circuit for a video signal
VICTOR COMPANY OF JAPAN13 citations74
US4558353ADec 10, 1985
Circuit for reducing noise in a carrier chrominance signal
VICTOR COMPANY OF JAPAN7 citations74
US4490749ADec 25, 1984
Color video signal recording and/or reproducing system
VICTOR COMPANY OF JAPAN9 citations74
US4486789ADec 4, 1984
Magnetic recording and/or reproducing apparatus
VICTOR COMPANY OF JAPAN8 citations74
US4476501AOct 9, 1984
Audio signal recording and/or reproducing system for eliminating audio crosstalk
VICTOR COMPANY OF JAPAN10 citations74
US4342053AJul 27, 1982
Video signal, speed-change reproducing system
VICTOR COMPANY OF JAPAN8 citations74
US4064537ADec 20, 1977
Amplitude limiting circuit for frequency modulated video signals
VICTOR COMPANY OF JAPAN7 citations74
US4639805AJan 27, 1987
Combination of reproducing heads and a rotary transformer device
VICTOR COMPANY OF JAPAN8 citations73
US4618893AOct 21, 1986
Noise reducing system for video signal
VICTOR COMPANY OF JAPAN19 citations73
US4607285AAug 19, 1986
Noise reducing system for video signal
VICTOR COMPANY OF JAPAN16 citations73
US4402022AAug 30, 1983
Tracking control system in a magnetic reproducing apparatus
VICTOR COMPANY OF JAPAN7 citations73
US4246616AJan 20, 1981
System for reproducing a video signal in a slow motion or still picture reproduction
VICTOR COMPANY OF JAPAN13 citations73
US5051846ASep 24, 1991
Magnetic video tape recording and reproducing apparatus
VICTOR COMPANY OF JAPAN15 citations72
US4414586ANov 8, 1983
Pilot signal recording and reproducing system
VICTOR COMPANY OF JAPAN10 citations72
US4068257AJan 10, 1978
Color video signal recording and/or reproducing system
VICTOR COMPANY OF JAPAN16 citations72
US4295171AOct 13, 1981
System for controlling rotation of rotating structure
VICTOR COMPANY OF JAPAN12 citations71
US4364098ADec 14, 1982
Multiple-channel rotary transformer circuit in a magnetic recording and/or reproducing apparatus
VICTOR COMPANY OF JAPAN8 citations69
US5062008AOct 29, 1991
Recording of frequency-multiplex signal on recording medium
VICTOR COMPANY OF JAPAN2 citations63
US4646165AFeb 24, 1987
Chrominance signal recording apparatus utilizing digital sampling and quantizing techniques
VICTOR COMPANY OF JAPAN6 citations63
US4622597ANov 11, 1986
Sound and video multiplex recording system
VICTOR COMPANY OF JAPAN5 citations63
US4757391AJul 12, 1988
Helical scan type magnetic recording and reproducing apparatus recording multiple signals on multiple axially displaced tape tracks
VICTOR COMPANY OF JAPAN4 citations62
US4719518AJan 12, 1988
Magnetic recording apparatus for carrying out recording by selectively using one of two kinds of recording systems
VICTOR COMPANY OF JAPAN5 citations62
US4635116AJan 6, 1987
Video signal delay circuit
VICTOR COMPANY OF JAPAN7 citations62
US4644412AFeb 17, 1987
Video signal recording and reproducing apparatus
VICTOR COMPANY OF JAPAN3 citations61
US4425584AJan 10, 1984
Video signal recording and/or reproducing system
VICTOR COMPANY OF JAPAN5 citations61
US4593327AJun 3, 1986
Color video signal recording and/or reproducing system
VICTOR COMPANY OF JAPAN3 citations60
US4626934ADec 2, 1986
Cue signal recording circuit for magnetic recording and reproducing apparatus
VICTOR COMPANY OF JAPAN4 citations58
KONICA MINOLTA BUSINESS TECH
4 patentsUS7738815B2Jun 15, 2010
Image forming apparatus including a toner discharge operation
KONICA MINOLTA BUSINESS TECH1 citations52
US7092649B2Aug 15, 2006
Charging device and image forming apparatus provided therewith
KONICA MINOLTA BUSINESS TECH0 citations52
US7324776B2Jan 29, 2008
Image forming apparatus, charge controlling apparatus, and image forming method
KONICA MINOLTA BUSINESS TECH0 citations40
US7197264B2Mar 27, 2007
Image forming apparatus
KONICA MINOLTA BUSINESS TECH0 citations40
MINOLTA CO LTD
2 patentsMITSUBISHI HITACHI POWER SYS LTD
2 patentsUS11530628B2Dec 20, 2022
Denitration device, heat recovery steam generator having the same, gas turbine combined cycle power plant and method of denitration
MITSUBISHI HITACHI POWER SYS LTD1 citations56
US11441774B2Sep 13, 2022
Method for operating flue gas purification system
MITSUBISHI HITACHI POWER SYS LTD0 citations47