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:
Aug. 01, 1995
Filed:
Dec. 06, 1994
Applicant:
Inventor:
Dale G Hall, Cedar Crest, NM (US);
Assignee:
Motorola, Inc., Schaumburg, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
310316 ; 310317 ; 310318 ;
Abstract
An improved piezoelectric material detector. The material detector (10) has a transducer structure (12) adapted to provide a certain vibration activity. A reset circuit (30) is included to minimize the possibility of false readings. And, a driving circuit (52) and detecting circuit (68) are utilized to drive and sense the presence of a material.