Wing Sze Wong

US Patent:

7438509, Oct 21, 2008

Filed:

Jun 27, 2007

Appl. No.:

11/769682

Inventors:

Wing Chai Wong - Brooklyn NY, US
Pik Ngar Wong - Brooklyn NY, US

International Classification:

B23B 51/04

US Classification:

408 67, 408204

Abstract:

The slug retrieval apparatus is used with a hole saw with chuck mechanism, after a pilot hole is drilled. The apparatus is fitted within the chuck mechanism and the hole saw then used to cut a hole in the workpiece. The shaft of the apparatus guides the hole saw cut, as would the shaft of a pilot bit. The springs within the slot of the shaft compress within the slot to allow the shaft to pass through the pilot hole drilled in the workpiece. The springs then expand to capture the shaft within the hole. When the slug is cut from the workpiece by the saw, the springs capture the slug until the user compresses the springs to remove the slug. The springs provide for expansion no matter the speed of the apparatus used to drive the hole saw.

US Patent:

55155340, May 7, 1996

Filed:

Sep 29, 1992

Appl. No.:

7/953403

Inventors:

Mooi C. Chuah - Middletown NJ
Wing S. Wong - Holmdel NJ

Assignee:

AT&T Corp. - Murray Hill NJ

International Classification:

G06F 1730

US Classification:

395600

Abstract:

A facility is provided for normalizing the format of stored data records using a dictionary that is generated from a training set of data records having predefined formats.