Audio teleconference equipment with acoustic echo canceller

Sasaki , et al. April 17, 1

Patent Grant D307274

U.S. patent number D307,274 [Application Number 07/263,491] was granted by the patent office on 1990-04-17 for audio teleconference equipment with acoustic echo canceller. This patent grant is currently assigned to NEC Corporation. Invention is credited to Keigo Kawasaki, Kiyoshi Sasaki.


United States Patent D307,274
Sasaki ,   et al. April 17, 1990

Audio teleconference equipment with acoustic echo canceller

Claims

An audio teleconference equipment with acoustic echo canceller, as shown.
Inventors: Sasaki; Kiyoshi (Tokyo, JP), Kawasaki; Keigo (Tokyo, JP)
Assignee: NEC Corporation (Tokyo, JP)
Appl. No.: 07/263,491
Filed: October 27, 1988

Foreign Application Priority Data

Apr 27, 1988 [JP] 17398/1988
Current U.S. Class: D14/243; 379/420.01; 379/440; D14/140; D14/240
Field of Search: ;D14/240,140,241,242,243,142,151 ;379/440,206,202,420,432,444,441,436,388,158

References Cited [Referenced By]

U.S. Patent Documents
D113586 February 1939 Young
D121131 June 1940 Stolzenbengen, Jr.
D174406 April 1955 Adler
D192637 April 1962 Judson
D203186 December 1965 Kamp
D239536 April 1976 Chadima, Jr. et al.
D250647 December 1978 Breger
D259786 July 1981 Leeson et al.
D278055 March 1985 Vajdoffy
D285553 September 1986 Baba et al.
D286403 October 1986 Panshad et al.
D290006 May 1987 Frost et al.
D293319 December 1987 Matsuda et al.
D299030 December 1988 Menn
D300320 March 1989 Watanabe
2506715 May 1950 Ffolliott
2924670 February 1960 Dee
4184048 January 1980 Aleaide
4400724 August 1983 Fields
4736411 April 1988 Chan
4758887 July 1988 Engel et al.

Other References

Brochure: Shure ST6000 Type 2, Oct., 1987. .
Brochure: Bota Conference 21-L System (date of publication unknown). .
Brochure: TIS Conference (date of publication unknown). .
Brochure: RYKOS VIC (date of publication unknown)..

Primary Examiner: Fay, Jr.; Horace B.
Attorney, Agent or Firm: Sughrue, Mion, Zinn, Macpeak & Seas

Description



FIG. 1 is a front, top and right side perspective view of an audio teleconference equipment with acoustic echo canceller, showing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a top plan view thereof; and

FIG. 7 is a bottom plan view thereof.

* * * * *


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