Thomas E Chapman

US Patent:

20050098609, May 12, 2005

Filed:

Jan 14, 2002

Appl. No.:

10/467006

Inventors:

Victor Greenhut - Piscataway NJ, US
Thomas Chapman - Corning NY, US

International Classification:

B23K031/02

US Classification:

228122100

Abstract:

A method for directly joining ceramics () and metals (). The method involves forming a structure having a ceramic component (), a more refractory metallic component and a less refractory metallic-material-based interlayer () disposed between the ceramic component () and the metallic component (); adding a eutectic forming reactant to the metallic interlayer (); and heating the structure to approximately a eutectic melting temperature of the reactant and the interlayer to form a metallic-material-based eutectic liquid that interacts with the metallic component to form a bond that directly joins the ceramic and metallic components to one another.

US Patent:

54325064, Jul 11, 1995

Filed:

Feb 25, 1992

Appl. No.:

7/840540

Inventors:

Thomas R. Chapman - Fort Lauderdale FL

International Classification:

G06F 1530

US Classification:

34082534

Abstract:

A system for verifying the authenticity of a document that bears a number of fields of strings of variable characters such as a check bearing date of issue field, payee field and numeric and alpha amount fields, includes a computer at the document issuing and printing station that controls the computer. A secret program selects certain characters from the strings, transforms those characters into other characters by various methods to generate a unique string of characters to print on the document as a unique code. Any remote authenticating station can authenticate the document with a computer that contains the same secret program used at the time the document was issued. The strings of variable characters born by the document are read into the computer at the authenticating station. The secret program causes the computer to generate an authenticating code from the data read into the computer from the document. The computer compares the authenticating code to the unique code born by the document.