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:
Jan. 13, 1981
Filed:
Nov. 21, 1978
Applicant:
Inventor:
Siegfried Beisswenger, Preetz, DE;
Assignee:
Dr. Ing. Rudolf Hell GmbH, Kiel, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G21K / ;
U.S. Cl.
CPC ...
2503 / ; 250311 ; 2503 / ; 315382 ;
Abstract
An electron-optical lens arrangement for electron beam apparatus having a static and a dynamic focussing lens system, in which the dynamic focussing lens system is situated inside the static focussing lens system.