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			 The ornamental design for a toothbrush head and neck unit, as shown and described.  | 
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FIG. 1 is a bottom plan view of a toothbush head and neck unit showing our new design;
FIG. 2 is an elevational view of the side thereof;
FIG. 3 is an enlarged top plan view thereof;
FIG. 4 is an enlarged opposite side elevational view thereof;
FIG. 5 is a front elevational view thereof;
FIG. 6 is a rear elevational view thereof;
FIG. 7 is a perspective view thereof;
FIG. 8 is a bottom plan view showing a second embodiment of our new design;
FIG. 9 is an elevational view of the side thereof;
FIG. 10 is an enlarged top plan view thereof;
FIG. 11 is an enlarged opposite side elevational view thereof;
FIG. 12 is a front elevational view thereof;
FIG. 13 is a rear elevational view thereof; and,
FIG. 14 is a perspective view thereof.
Crawford, John C., Curtis, John P., Rustogi, Kedar N., Kemp, James H., Mintel, Thomas E., Heinzelman, Bert D., Lamond, Donald R., Edelman, Laura H.
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| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc | 
| Dec 13 1991 | Colgate-Palmolive Company | (assignment on the face of the patent) | / | |||
| Feb 04 1992 | HEINZELMAN, PERT D | Colgate-Palmolive Company | ASSIGNMENT OF ASSIGNORS INTEREST | 006393 | /0359 | |
| Feb 04 1992 | EDELMAN, LAURA H | Colgate-Palmolive Company | ASSIGNMENT OF ASSIGNORS INTEREST | 006393 | /0366 | |
| Feb 05 1992 | LAMOND, DONALD R | Colgate-Palmolive Company | ASSIGNMENT OF ASSIGNORS INTEREST | 006393 | /0366 | |
| Feb 07 1992 | CURTIS, JOHN P | Colgate-Palmolive Company | ASSIGNMENT OF ASSIGNORS INTEREST | 006393 | /0369 | |
| Feb 13 1992 | CRAWFORD, JOHN C | Colgate-Palmolive Company | ASSIGNMENT OF ASSIGNORS INTEREST | 006393 | /0369 | |
| Feb 25 1992 | KEMP, JAMES H | Colgate-Palmolive Company | ASSIGNMENT OF ASSIGNORS INTEREST | 006393 | /0359 | |
| Feb 28 1992 | MINTEL, THOMAS E | Colgate-Palmolive Company | ASSIGNMENT OF ASSIGNORS INTEREST | 006393 | /0359 | |
| Mar 02 1992 | RUSTOGI, KEDAR N | Colgate-Palmolive Company | ASSIGNMENT OF ASSIGNORS INTEREST | 006393 | /0369 | 
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