The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 26, 2005
Filed:
May. 22, 2003
Applicant:
Robert A. Gatzen, Wethersfield, CT (US);
Inventor:
Robert A. Gatzen, Wethersfield, CT (US);
Assignee:
Avedis Zildjian Company, Norwell, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G10D013/02 ;
U.S. Cl.
CPC ...
Abstract
A metallic drum shell has grooves which enhance its acoustical properties to provide a warmer and less harsh sound. The grooving can be a continuous spiral groove formed in the outside surface of the drum shell. The grooves can be formed with selected depths, widths, contours and frequencies in order to achieve the desired fundamental pitch, resonance and overtone suppression.