Arthur I Diamond

US Patent:

43791786, Apr 5, 1983

Filed:

Mar 27, 1981

Appl. No.:

6/248275

Inventors:

Louis B. Meadows - Valencia CA
Arthur S. Diamond - Ventura CA

Assignee:

Dactek International, Inc. - Van Nuys CA

International Classification:

A61B 510

US Classification:

427 1

Abstract:

Fingerprints images are formed by applying the distal portion 29 of a finger 32 to a porous pad 10 impregnated with a solution of marking compound. The finger portion may be prewetted or cleaned with cloth 30 impregnated with detergent solution. The finger 32 is then applied to a square 36 of a fingerprint card 38 impregnated with an aqueous solution of polyhydroxy developer such as 8-hydroxy-quinoline and propyl gallate containing a high molecular weight dibasic acid such as azelaic acid. A fingerprint image 40 immediately develops. Traces of the image can be removed with a cleaning solution impregnated cloth 42.

US Patent:

46990771, Oct 13, 1987

Filed:

Jan 28, 1987

Appl. No.:

7/009013

Inventors:

Louis B. Meadows - Valencia CA
Arthur S. Diamond - Ventura CA

Assignee:

Dactek International, Inc. - Van Nuys CA

International Classification:

B41K 100

US Classification:

118 315

Abstract:

A compact fingerprinting system includes an applicator comprising a sealed packet (13) containing a porous pad (12) impregnated with a solution of water-soluble, color-forming, marking compound, such as iron chloride having a controlled, optimum water content. A print of a body part, such as a finger, is formed by opening the packet (60) and wiping the distal portion of a finger (76) on the pad (62), such as a folded towelette to form a non-visible, latent image pattern. The pattern is transferred to a card (40) which can contain an area (44) impregnated with developer for the marking compound. The developer reacts with the pattern to form a dark, distinct, permanent image (84). The card (40) and packet (13) can be enclosed in an envelope (64) to form a low profile, lightweight, mailable, self-administered fingerprinting system.

US Patent:

41900561, Feb 26, 1980

Filed:

Oct 31, 1977

Appl. No.:

5/846800

Inventors:

Robert Tapper - West Los Angeles CA
Arthur S. Diamond - Ventura CA
Ajit S. Arora - San Francisco CA

Assignee:

General Medical Company - Los Angeles CA

International Classification:

A61B 500

US Classification:

128630

Abstract:

Method and apparatus for recording sweat gland activity which provides a pictorial representation thereof by physical contact of an iodide treated skin area with a dry sensitized substrate. In one preferred embodiment, the sensitized substrate comprises a sheet material which has been coated with an aqueous solution containing from 1 to 10 percent by weight of starch and from 2 to 10 percent by weight of a suitable oxidizing agent such as potassium persulfate. Alternately, the dry sensitized substrate comprises a starch-oxidizing agent mixture which has been impregnated into an absorbent base layer. With slight modification of the foregoing embodiment, the present invention also provides a method and apparatus for obtaining inkless fingerprints by forming a sensitized coating in situ on a substrate. For fingerprinting purposes, the sensitized coating is preferably formed from a quick drying starch-oxidizing agent solution including alcohol as a solvent. Accordingly, an aqueous iodide solution is applied to the skin area, and the treated skin area is subsequently contacted with the dry sensitized coating to produce the fingerprint.