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:
Sep. 23, 2003
Filed:
May. 25, 2000
Yorio Hidehira, Okayama, JP;
Microcraft KK, Okayama, JP;
Abstract
It is the object to automatically measure the characteristic impedance of a printed wiring circuit of a printed wiring substrate using a coaxial probe. The present invention provides an impedance measuring device for printed wiring boards that has a test probe driving means such as a coaxial probe which mounts a test probe unit that has a first contact stylus and a second contact stylus provided at a position apart from the first contact stylus by a certain distance with its tip facing the same direction as the first contact stylus. The impedance measuring device has the test probe unit moveable to any point on the board such that the first and second contact styli may be brought into contact with predetermined points of measurement on the board. The impedance measuring device is characterized by having a second contact stylus turning means turns the second contact stylus of the test probe unit mounted around the first contact stylus.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile