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:
Feb. 14, 1978
Filed:
Jun. 04, 1976
Hiroshi Yokoi, Machida, JA;
Takayasu Shiokawa, Yokohama, JA;
Abstract
A system for receiving through a single antenna apparatus a direct radio wave and reflected radio waves arriving from the same radio wave source, in which the resultant level of the direct radio wave and the reflected radio waves is detected under a condition where the directivity characteristic of the antenna apparatus is slightly altered at the arrival bearing of the reflected radio waves at intervals sufficiently shorter than that of fading perculiar to the paths of the direct wave and reflected waves, and the directivity characteristic of the antenna apparatus is modified at the arrival bearing of the reflected radio waves to raise the resultant level by the use of error voltages of the above intervals each indicative of the polarity of a difference between the directivity pattern of the antenna apparatus and an optimum pattern.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile