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The ornamental design for a photoelectric smoke detector, as shown and described. |
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FIG. 1 is a left side elevational view of a photoelectric smoke detector showing our new design;
FIG. 2 is a top plan view thereof;
FIG. 3 is a right side elevational view thereof;
FIG. 4 is a side elevational view taken 90 degrees from FIG. 1;
FIG. 5 is a reduced bottom plan view thereof.
Thornton, Jr., Hugh P., Powers, Robert B.
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| Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
| Jul 25 1983 | POWERS, ROBERT B | AMERICAN DISTRICT TELEGRAPH COMPANY, A DE CORP | ASSIGNMENT OF ASSIGNORS INTEREST | 004167 | /0553 | |
| Jul 27 1983 | THORNTON, HUGH P JR | AMERICAN DISTRICT TELEGRAPH COMPANY, A DE CORP | ASSIGNMENT OF ASSIGNORS INTEREST | 004167 | /0553 | |
| Aug 22 1983 | American District Telegraph Company | (assignment on the face of the patent) | / | |||
| May 13 1986 | American District Telegraph Company | ADT, INC | CHANGE OF NAME SEE DOCUMENT FOR DETAILS | 005077 | /0275 | |
| Feb 29 1988 | ADT, INC | ADT SECURITY SYSTEMS, INC | CHANGE OF NAME SEE DOCUMENT FOR DETAILS | 005091 | /0837 | |
| Dec 31 1988 | ADT DIVERSIFIED SERVICES, INC | ADT SECURITY SYSTEMS, INC | ASSIGNMENT OF ASSIGNORS INTEREST | 005208 | /0081 | |
| Jan 03 1989 | ADT SECURITY SYSTEMS, INC | ADT DIVERSIFIED SERVICES, INC , | CHANGE OF NAME SEE DOCUMENT FOR DETAILS JANUARY 6, 1989 NEW JERSEY | 005091 | /0824 | |
| May 31 1991 | ADT SECURITY SYSTEMS, INC | SENTROL ACQUISITION CORPORATION A DELAWARE CORPORATION | ASSIGNMENT OF ASSIGNORS INTEREST | 005916 | /0045 | |
| Jan 03 1992 | SENTROL ACQUISITION CORP A CORP OF DELAWARE MERGED INTO | SENTROL, INC A CORP OF OREGON | MERGER SEE DOCUMENT FOR DETAILS EFFECTIVE ON 12 31 1991OR | 006071 | /0296 |
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