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:
Jul. 04, 1978
Filed:
Feb. 28, 1977
Applicant:
Inventors:
Frank Klimavicz, Fort Belvoir, VA (US);
Jack S Chase, Jericho, VT (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01C / ;
U.S. Cl.
CPC ...
33 / ; 33227 ; 33 / ;
Abstract
Apparatus for determining whether an intermediate terrain feature blocks the line of sight between a pair of spaced terrain points, comprising a linearly extending base, at least three spaced posts extending perpendicularly to the base and having cursors on them, the distances between the posts being selectively adjustable. In one embodiment, the base is of three telescopic sections, with a post mounted on each of the sections. In another embodiment, the base is fixed and has three sliders, on each of which a post is mounted. The posts are pivotally mounted on the base, so as to be stored substantially parallel to the base.