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. 11, 1992
Filed:
Dec. 10, 1990
Applicant:
Inventors:
Charles Creaser, Lady Lake, FL (US);
Ray C Johnson, Webster, NY (US);
Assignee:
Chu Associates, Inc., Littleton, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B21D / ;
U.S. Cl.
CPC ...
72176 ; 72307 ;
Abstract
An improved method of and apparatus for forming sheet material into compound curves by drawing, in which critical positioning, dimensioning and relative curvatures of forming bead stages are provided for such curvatures as sectors of paraboloidal antenna reflectors and other compound curve sheets.