The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 31, 1995
Filed:
Jul. 16, 1993
Applicant:
Inventors:
Christopher D Hruska, Blue Springs, MO (US);
Todd M McGinn, Olathe, KS (US);
Wayne A Smith, Liberty, MO (US);
Assignee:
AT&T Corp., Murray Hill, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F42C / ;
U.S. Cl.
CPC ...
1022025 ; 1022021 ; 1022022 ;
Abstract
Disclosed is an electroexplosive device including a semiconductor igniter chip with improved crack detection features and which fires in a known location. The chip includes diffused regions so that cracks formed therethrough will result in high leakage currents which are easily detected.