Central control unit for an alarm system
Description
FIG. 1 is a front elevation view of a central control unit for an alarm system showing our new design;
FIG. 2 is a right side elevation view thereof, the left side being a mirror image;
FIG. 3 is a rear elevation view thereof.
FIG. 4 is a top plan view thereof.
FIG. 5 is a bottom plan view thereof.
FIG. 6 is a front perspective view thereof.
Referenced Cited
U.S. Patent Documents
| D218439 | August 1970 | Horowitz et al. |
| D236445 | August 1975 | Danz et al. |
| D273573 | April 24, 1984 | Aulicino |
Patent History
Patent number: D301844
Type: Grant
Filed: Feb 12, 1986
Date of Patent: Jun 27, 1989
Assignee: National Industrial Security Corp. (St. Louis, MO)
Inventors: Frank Schwarz (Stamford, CT), Richard H. Nielson (Frederick, MD), Kent Chen (Taipei)
Primary Examiner: Susan J. Lucas
Law Firm: Kalish & Gilster
Application Number: 6/833,495
Type: Grant
Filed: Feb 12, 1986
Date of Patent: Jun 27, 1989
Assignee: National Industrial Security Corp. (St. Louis, MO)
Inventors: Frank Schwarz (Stamford, CT), Richard H. Nielson (Frederick, MD), Kent Chen (Taipei)
Primary Examiner: Susan J. Lucas
Law Firm: Kalish & Gilster
Application Number: 6/833,495
Classifications
Current U.S. Class:
D10/109;
D13/12
