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Inventor

Frank C. Liu

Inventor
Phoenix, AZ, US

Overview

7→
Patents
1981–1991
Patent span
Electricity
Primary field (CPC H)

Patents· 7 as inventor

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

H04Nprimary
H04NPictorial communication, e.g. television45%
H04MTelephonic communication18%
H03DDemodulation or transference of modulation from one carrier to another9%
H03JTuning resonant circuits9%
H03LAutomatic control, starting, synchronisation or stabilisation of generators of electronic oscillations or pulses9%
H04QSelecting9%
PatentTitleYear
5,029,200'Voice message system using synthetic speech'19914,769,833'Wideband switching system'19884,398,210'Impulse noise detection circuit for TV signals'19834,384,306'Variable peaking control circuit'19834,368,483'Video signal defect replacement circuitry'19834,321,624'AFT Circuit'19824,263,611'Television signal processing system'1981

Career & activity timeline

Assembled from patent assignee/location history and declaration credentials.

1981–1983Patents assigned to RCA CORP (5)· patent assignee history
1981Based in Kendall Park, NJ, US· patent location history
1982Based in Piscataway, NJ, US· patent location history
1983Based in Phoenix, AZ, US· patent location history
1988Patents assigned to AMERICAN TELEPHONE & TELEGRAPH (1)· patent assignee history
1988Patents assigned to AT & T INFORMATION SYSTEMS INC (1)· patent assignee history
1988Based in Westminster, CO, US· patent location history
1991Patents assigned to AT & T BELL LAB (1)· patent assignee history
1991Based in Denver, CO, US· patent location history

Inventor activity

Assignee and location history derived from the patent record.

Assignees
AssigneePatentsSpan
RCA CORP51981–1983
AMERICAN TELEPHONE & TELEGRAPH11988
AT & T BELL LAB11991
AT & T INFORMATION SYSTEMS INC11988
Locations
LocationPatentsSpan
Phoenix, AZ, US31983
Denver, CO, US11991
Westminster, CO, US11988
Piscataway, New Jersey, US11982
Kendall Park, New Jersey, US11981