David M Francis

US Patent:

6780369, Aug 24, 2004

Filed:

Aug 2, 1999

Appl. No.:

09/364892

Inventors:

Darrell Darrow - Chesapeake VA
David Francis - Norfolk VA
Michael Davis - Chesapeake VA
Yuting Wang - Norfolk VA

Assignee:

Face International Corp. - Norfolk VA

International Classification:

B28B 1093

US Classification:

264426, 264 69, 264 71, 264162, 264256, 264333

Abstract:

A method of finishing concrete using a vibrating tool to consolidate a âdry shakeâ aggregate into the upper layer of the concrete. The use of the vibrating tool causes moisture within the concrete mass to migrate into the surface layer where the moisture may hydrate the aggregates in the dry shake mixture. The ability to cause upward migration of water in the concrete mass provides a larger window of finishability for the concrete. The vibrations also provide thorough consolidation of aggregates in the upper layer of the concrete mass helping to prevent delamination.

US Patent:

44101821, Oct 18, 1983

Filed:

Jul 21, 1981

Appl. No.:

6/285502

Inventors:

David D. Francis - Annandale VA

International Classification:

A63F 300

US Classification:

273268

Abstract:

A gameboard comprises a dice rolling surface surrounded by a decorative rim. On the edges of the surface are integrally mounted one set of numerical indicia implicit in playing the game and a set of movable beads for keeping score. Only a pair of dice are removably held in a compartment along one edge. Thus, the entire board is fashioned for storing by hanging as a picture on the wall. The indicia used in playing the game comprises in a preferred embodiment a set of cubes mounted eccentrically on a rod to have two stable pivot positions displaying respectively the indicia and masking it. The gameboard is adapted for arithmetic education and entertainment by players of all ages. It includes features for stabilizing the aforesaid indicia and scoring means to prevent accidental misplacement but being changeable by manual force.