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Patent
   D271671
Priority
Nov 09 1981
Filed
Nov 09 1981
Issued
Dec 06 1983
Expiry
Dec 06 1997
Inventors
Thornton, …
Assg.orig
AMERICAN D…
Assg.curr
SENTROL, I…
Entity
unknown
Referenced by
13
References
3
Maint.:
n/a
The ornamental design for a smoke detector, as shown and described.

FIG. 1 is a front elevational view of a smoke detector, showing my new design;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a right side elevational view thereof.
INVENTORS:

Thornton, Jr., Hugh P.

THIS PATENT IS REFERENCED BY THESE PATENTS:
Patent Priority Assignee Title
D308947, Mar 10 1988 MAPLE CHASE COMPANY FORMERLY KNOWN AS COLEMAN SECURITY INC SEATT CORPORATION COLEMAN SAFETY & SECURITY PRODUCTS INC Smoke detector
D311703, May 18 1987 Pittway Corporation Smoke detector
D319600, Nov 13 1989 HP INTELLECTUAL CORP Smoke alarm
D331547, Jun 04 1990 Nittan Co., Ltd. Fire detector
D342213, Jun 18 1991 Cerberus AG Fire detector
D355386, Mar 24 1993 Cerberus AG Fire detector
D368043, Feb 27 1995 Styling City Limited Combined motion detector and audible alarm
D412296, Jun 17 1998 Hochiki Kabushiki Kaisha Photoelectric smoke detector
D627670, Dec 01 2009 Universal Security Instruments Inc.; Universal Security Instruments, Inc Hazardous condition detector
D627671, Dec 01 2009 Universal Security Instruments, Inc.; Universal Security Instruments, Inc DC hazardous condition detector
D631770, Sep 04 2009 Lutron Technology Company LLC Wireless sensor
D635476, Sep 04 2009 Lutron Technology Company LLC Wireless sensor
D697510, Mar 23 2011 Brother Industries, Ltd. Scanner with projector
THIS PATENT REFERENCES THESE PATENTS:
Patent Priority Assignee Title
3226703,
4257039, Dec 26 1978 Norma J., Webb Smoke detector
D260975, Jun 25 1979 Meyer Aluminum Ltd. Fire alarm
ASSIGNMENT RECORDS    Assignment records on the USPTO
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Executed onAssignorAssigneeConveyanceFrameReelDoc
Oct 08 1981THORNTON, HUGH P JR AMERICAN DISTRICT TELEGRAPH COMPANY, A CORP OF DEASSIGNMENT OF ASSIGNORS INTEREST 0039500184 pdf
Nov 09 1981American District Telegraph Company(assignment on the face of the patent)
May 13 1986American District Telegraph CompanyADT, INC CHANGE OF NAME SEE DOCUMENT FOR DETAILS 0050770275 pdf
Feb 29 1988ADT, INC ADT SECURITY SYSTEMS, INC CHANGE OF NAME SEE DOCUMENT FOR DETAILS 0050910837 pdf
Dec 31 1988ADT DIVERSIFIED SERVICES, INC ADT SECURITY SYSTEMS, INC ASSIGNMENT OF ASSIGNORS INTEREST 0052080081 pdf
Jan 03 1989ADT SECURITY SYSTEMS, INC ADT DIVERSIFIED SERVICES, INC ,CHANGE OF NAME SEE DOCUMENT FOR DETAILS JANUARY 6, 1989 NEW JERSEY0050910824 pdf
May 31 1991ADT SECURITY SYSTEMS, INC SENTROL ACQUISITION CORPORATION A DELAWARE CORPORATIONASSIGNMENT OF ASSIGNORS INTEREST 0059160045 pdf
Jan 03 1992SENTROL ACQUISITION CORP A CORP OF DELAWARE MERGED INTO SENTROL, INC A CORP OF OREGONMERGER SEE DOCUMENT FOR DETAILS EFFECTIVE ON 12 31 1991OR0060710296 pdf
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