Patent
   D255684
Priority
Mar 21 1978
Filed
Mar 21 1978
Issued
Jul 01 1980
Expiry
Jul 01 1994
Assg.orig
Entity
unknown
2
5
n/a
The ornamental design for a response tracer amplifier unit having graphic amplifier response display for stereo sound systems and the like, as shown and described.

FIG. 1 is a front perspective view from above and to the right side of the response tracer amplifier unit having graphic amplifier response display for stereo sound systems and the like, showing my new design;

FIG. 2 is a front perspective view thereof, viewed from below and at the opposite side thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a side elevation view thereof viewed from the right side of FIG. 3, the opposite side elevation being a mirror image thereof; and

FIG. 5 is a bottom view thereof.

Castagna, John F.

Patent Priority Assignee Title
D484112, May 02 2002 Decorative sound spectrum display
D564509, Dec 21 2005 Victor Company of Japan, Limited Disc player with radio tuner
Patent Priority Assignee Title
2050044,
2781736,
2855257,
4173941, Jun 08 1978 CANADIAN PATENTS AND DEVELOPMENT LIMITED SOCIETE CANADIENNE DES BREVETS ET D EXPLOITATION LIMITEE Response tracer audio equalizer amplifier unit having graphic response display
234972,
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Executed onAssignorAssigneeConveyanceFrameReelDoc
Mar 21 1978Sparkomatic Corporation(assignment on the face of the patent)
Dec 23 1988Sparkomatic CorporationPHILADELPHIA NATIONAL BANK, THE, AS AGENTAMENDMENT TO AMEND THE ORIGINAL AGREEMENT DATED DECEMBER 31, 1983 SEE RECORD FOR DETAILS 0052210383 pdf
Dec 23 1988SPARKOMATIC FOR EAST LIMITEDPHILADELPHIA NATIONAL BANK, THE, AS AGENTAMENDMENT TO AMEND THE ORIGINAL AGREEMENT DATED DECEMBER 31, 1983 SEE RECORD FOR DETAILS 0052210383 pdf
Apr 26 1989Sparkomatic CorporationPHILADELPHIA NATIONAL BANK, THE, AS AGENTAMENDMENT TO AMED THE ORIGINAL AGREEMENT DATED DECEMBER 23, 1988 SEE RECORD FOR DETAILS 0052210378 pdf
Apr 26 1989SPARKOMATIC FOR EAST LIMITEDPHILADELPHIA NATIONAL BANK, THE, AS AGENTAMENDMENT TO AMED THE ORIGINAL AGREEMENT DATED DECEMBER 23, 1988 SEE RECORD FOR DETAILS 0052210378 pdf
Sep 08 1994CORESTATES BANK, N A *Sparkomatic CorporationRELEASE0071450302 pdf
Sep 08 1994Sparkomatic CorporationBOT FINANCIAL CORPORATIONSECURITY INTEREST SEE DOCUMENT FOR DETAILS 0071470717 pdf
Apr 15 1998BTM CAPITAL CORPORATION, F K A BOT FINANCIAL CORPORATIONPNC Bank, National AssociationSECURITY AGREEMENT0091380993 pdf
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