Patent
   D505435
Priority
Jun 12 2003
Filed
Jun 12 2003
Issued
May 24 2005
Expiry
May 24 2019
Assg.orig
Entity
unknown
1
5
n/a
The ornamental design for a crown bit, as shown and described.

FIG. 1 is a perspective view of a crown bit according to the present design;

FIG. 2 is a perspective view of a crown bit according to an alternative embodiment of the present design;

FIG. 3 is a top plan view of the crown bits of FIGS. 1 and 2;

FIG. 4 is a bottom plan view of the crown bits of FIGS. 1 and 2;

FIG. 5 is a right side elevation view of the crown bits of FIGS. 1 and 2; and

FIG. 6 is a front side elevation view of the crown bits of FIGS. 1 and 2; and,

FIG. 7 is a perspective view of the crown bits of FIGS. 1 and 2 and a drill bit, wherein the broken lines illustrate components that form no part of the design.

The broken lines in the figures are for illustrative purposes only and form no part of the claimed design.

Charland, Luc, Charland, Roger

Patent Priority Assignee Title
D541831, Jun 03 2005 Kabushiki Kaisha Miyanaga Hole cutter
Patent Priority Assignee Title
4128136, Dec 09 1977 Lamage Limited Drill bit
4211294, Apr 21 1978 Acker Drill Company, Inc. Impregnated diamond drill bit
4681174, Jan 16 1986 KAZAKHSKY POLITEKHNICHESKY INSTITUT IMENI V I Diamond crown bit
5322139, Jul 28 1993 Loose crown underreamer apparatus
6702650, May 09 2000 3M Innovative Properties Company Porous abrasive article having ceramic abrasive composites, methods of making, and methods of use
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