Inventor

Botaro Hirosaki

Inventor

Tokyo, JP

Overview

14→

Patents

1981–1992

Patent span

Electricity

Primary field (CPC H)

Patents· 14 as inventor

Public. Assignee & technology derived from the patent record. Each patent links to its LexDana page.

H04Lprimary

H04LTransmission of digital information, e.g. telegraphic communication50%

H04JMultiplex communication20%

H03LAutomatic control, starting, synchronisation or stabilisation of generators of electronic oscillations or pulses15%

H03HImpedance networks, e.g. resonant circuits5%

H04BTransmission5%

Y02DClimate change mitigation technologies in information and communication technologies [ict], i.e. information and communication technologies aiming at the reduction of their own energy use5%

PatentTitleYear

5,093,843'Digital communicationn system using partial response and bipolar coding techniques'1992 4,893,265'Rate conversion digital filter'1990 4,803,680'Destuffing circuit with a digital phase-locked loop'1989 4,661,945'Differential coding system and apparatus therefor'1987 4,642,575'Phase-locked loop with supplemental phase signal'1987 4,639,939'Apparatus for cancelling periodic carrier phase jitters'1987 4,621,355'Method of synchronizing parallel channels of orthogonally multiplexed parallel data transmission system and improved automatic equalizer for use in such a transmission system'1986 4,613,975'Selective fading protection system'1986 4,604,583'Frequency offset correcting circuit'1986 4,575,682'Circuit for establishing accurate sample timing'1986 4,541,104'Framing circuit for digital system'1985 4,423,518'Timing recovery circuit'1983 4,392,220'Modem to be coupled to a directional transmission line of an SS multiplex communication network'1983 4,300,229'Transmitter and receiver for an othogonally multiplexed QAM signal of a sampling rate N times that of PAM signals, comprising an N/2-point offset fourier transform processor'1981

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1981–1983Patents assigned to NIPPON ELECTRIC CO (3)· patent assignee history

1981–1992Based in Tokyo, JP· patent location history

1985–1992Patents assigned to NEC CORP (11)· patent assignee history

Inventor activity

Assignee and location history derived from the patent record.

Assignees

Assignee	Patents	Span
NEC CORP	11	1985–1992
NIPPON ELECTRIC CO	3	1981–1983

Locations

Location	Patents	Span
Tokyo, JP	14	1981–1992