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The ornamental design for a headset amplifier, as shown and described. |
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FIG. 1 is a top, front and right side perspective view of a headset amplifier showing our new design;
FIG. 2 is a top plan view thereof;
FIG. 3 is a bottom plan view thereof;
FIG. 4 is a right side elevational view thereof;
FIG. 5 is a left side elevational view thereof; and,
FIG. 6 is a rear elevational view thereof.
Hampf, Jan, Larsen, Leo, Langhorn, Karsten
| Patent | Priority | Assignee | Title |
| D412904, | Aug 13 1998 | Smith Corona Corporation | Telephone headset amplifier unit |
| D423002, | Jan 29 1998 | GN Netcom A/S | Telephone switch with holder |
| D457867, | Sep 05 2000 | GN Netcom, Inc. | Telephone headset amplifier |
| D464333, | Sep 05 2000 | GN Netcom, Inc. | Telephone headset amplifier |
| D938947, | Feb 07 2019 | GN AUDIO A S | Communications equipment |
| Patent | Priority | Assignee | Title |
| 180637, | |||
| D272443, | Dec 30 1981 | Mattel, Inc. | Family pager transmitter device or similar article |
| D286635, | Feb 15 1984 | John Manufacturing Limited | Telephone amplifier |
| D318279, | Sep 08 1988 | Whirlwind Music Distributors, Inc. | Multi-channel mixer for a headphone control box |
| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
| Nov 07 1989 | HAMPF, JAN | GN NETCOM A S, BISPEVEJ 4, 2400 COPENHAGEN NV, DK, A CORP OF DENMARK | ASSIGNMENT OF ASSIGNORS INTEREST | 005188 | /0216 | |
| Nov 20 1989 | LANGHORN, KARSTEN | GN NETCOM A S, BISPEVEJ 4, 2400 COPENHAGEN NV, DK, A CORP OF DENMARK | ASSIGNMENT OF ASSIGNORS INTEREST | 005188 | /0216 | |
| Nov 20 1989 | LARSEN, LEO | GN NETCOM A S, BISPEVEJ 4, 2400 COPENHAGEN NV, DK, A CORP OF DENMARK | ASSIGNMENT OF ASSIGNORS INTEREST | 005188 | /0216 | |
| Dec 01 1989 | GN Netcom A/S | (assignment on the face of the patent) | / |
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