Conferencing telephone unit

Conferencing telephone unit
D259786

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Patent D259786
Priority Oct 03 1978
Filed Oct 03 1978
Issued Jul 07 1981
Expiry Jul 07 1995
Inventors Read, Clif…
Assg.orig Northern T…
Assg.curr Northern T…
Entity unknown
Referenced by 23
References 7
Maint.: n/a

The ornamental design for a conferencing telephone unit, substantially as shown.

FIG. 1 is a perspective view of the conferencing telephone unit;

FIG. 2 is a top plan view of the unit illustrated in FIG. 1;

FIG. 3 is a bottom plan view of the unit illustrated in FIG. 1; and

FIG. 4 is a side view of the unit illustrated in FIG. 1.

INVENTORS:

Read, Clifford D., Leeson, Fred D., Main, Henry A.

THIS PATENT IS REFERENCED BY THESE PATENTS:

Patent	Priority	Assignee	Title
4991688,	May 02 1989		Audio speaker system
D283891,	Dec 08 1983	TELECONFERENCING TECHNOLOGIES, INC , A DE CORP	Teleconferencing microphone
D287126,	Jan 19 1984	John Manufacturing Ltd.	Telephone amplifier
D287127,	Jan 19 1984	John Manufacturing Lmtd.	Combined telephone amplifier and pen holder
D292283,	Nov 04 1985	Shure Incorporated	Module for teleconference communication
D307274,	Apr 27 1988	NEC Corporation	Audio teleconference equipment with acoustic echo canceller
D316639,	Apr 30 1987	Nesher Industries, Inc.; NESHER INDUSTRIES, INC	Adjustable table
D498224,	Feb 18 2004	Telco Systems, Inc.	Teleconference speakerphone
D499392,	Apr 07 2004	CLEARONE INC	Conferencing phone
D582398,	Dec 19 2007	JAWB ACQUISITION LLC; JAWB Acquisition, LLC	Earpiece assembly
D582898,	Dec 19 2007	JAWB ACQUISITION LLC; JAWB Acquisition, LLC	Earpiece shield
D606962,	Nov 28 2008	Yamaha Corporation	Speakerphone
D611946,	Feb 18 2009	Jesse Paul, Wisniewski	Computer USB flash drive housing
D797711,	Mar 31 2016	SAMSUNG ELECTRONICS CO , LTD	Network hub
D819607,	Apr 26 2016	SAMSUNG ELECTRONICS CO , LTD	Microphone
D820802,	Nov 10 2015	SENNHEISER ELECTRONIC GMBH & CO KG	Unit for conference system
D825132,	Mar 01 2016	EICKHOF COLUMBARIA, INC	Columbarium with memorial band
D873525,	Mar 01 2016	Eickhof Columbaria, Inc.	Columbarium with memorial band
D874084,	Mar 01 2016	Eickhof Columbaria, Inc.	Columbarium with memorial band
D876375,	Jun 04 2018	Blackmagic Design Pty Ltd	Desktop video processor
D879058,	Jun 04 2018	Blackmagic Design Pty Ltd	Desktop video processor
D892756,	Jun 04 2018	Blackmagic Design Pty Ltd	Desktop video processor
D931119,	Nov 05 2019	Wistron Corporation	Detection apparatus

THIS PATENT REFERENCES THESE PATENTS:

Patent	Priority	Assignee	Title
3931867,	Feb 12 1975	Electrostatic Research Corporation	Wide range speaker system
4078155,	Jan 17 1977	Northern Telecom Limited	Telephone apparatus for use in a conference room
4184048,	May 09 1977	Etat Francais; Sous-marins et du Radio	System of audioconference by telephone link up
192637,
212004,
227478,
D244468,	Nov 05 1975	Deutsche Telephonwerke und Kabelindustrie Aktiengesellschaft	Desk telephone station with built-in freespeaking device and an additional casing for a sound transmitter and/or receiver

ASSIGNMENT RECORDS Assignment records on the USPTO

Executed on	Assignor	Assignee	Conveyance	Frame	Reel	Doc
Oct 03 1978		Northern Telecom Limited	(assignment on the face of the patent)

MAINTENANCE FEES AND DATES: Maintenance records on the USPTO

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Date	Maintenance Schedule