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United States Patent [w]

Attenberger et al.

US005897746A [ii] Patent Number: [45] Date of Patent:

5,897,746 Apr. 27, 1999

[54] METHOD FOR EQUIPPING PAPERS OF

VALUE WITH AUTHENTICITY FEATURES

[75] Inventors: Thomas Attenberger, Poing; Dieter Stein, Holzkirchen; Gerhard Stenzel, Germering; Wilhelm Ilgmann,

Wolfratshausen, all ol Germany

[73] Assignee: Giesecke & Devrient, GmbH, Munich, Germany

[21] Appl. No.: 08/824,195 [22] Filed: Mar. 25, 1997

Related U.S. Application Data

[63] Continuation of application No. 08/362,872, Dec. 23, 1994, abandoned.

[30] Foreign Application Priority Data

Dec. 24, 1993 [DE] Germany 43 44 552

[51] Int. CI.6 D21H 21/40; D21H 23/24;

B44F 1/12

[52] U.S. CI 162/140; 162/134; 162/110;

427/185

[58] Field of Search 162/140, 134,

162/263, 110; 283/72, 95, 113, 58, 57, 56; 427/197, 203, 185, 424

[56] References Cited

U.S. PATENT DOCUMENTS

1,281,951 10/1918 Harper 283/113 X

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