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The ornamental design for a central unit for conference and public address systems, as shown.
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FIG. 1 is a perspective view showing my design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a left side elevational view thereof;
FIG. 5 is a right 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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| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
| Jun 01 2001 | CORNELISSEN, MICHIEL | U S PHILIPS CORPORATION | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 012176 | /0905 | |
| Sep 14 2001 | Koninklijke Philips Electronics N.V. | (assignment on the face of the patent) | / | |||
| Sep 04 2002 | U S PHILIPS CORPORATION | Koninklijke Philips Electronics N V | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 013282 | /0520 | |
| Sep 05 2002 | U S PHILIPS CORPORATION | Koninklijke Philips Electronics N V | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 013282 | /0497 |
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