ADJUSTABLE DIAPHRAGM GAME CALL Patent No. 5,785,574 Issued: July 28, 1998 Inventor: Joseph R. Sears, P.O. Box 154, Spencer, NY 14883

A device for adjusting the pitch and quality of the sound produced by a diaphragm-type game call. Two embodiments are presented, which may be built by the manufacturer into a conventional call or clipped onto a pre-existing call by the hunter. The invention comprises a tuning bar which extends across the width of the diaphragm. 

The tuning bar may be slid along the length of the diaphragm, from the vibrating edge inward toward the fixed supported end. In the preferred embodiment, the tuning bar has a tab or "step" which extends downward toward the diaphragm, acting as a fret or stop and modifying the air flow over the diaphragm, allowing greater variations in sound. 

Go Back for more representative patents.

Home || Intellectual Property || Patents || Trademarks || Copyrights

Brown & Michaels, PC
400 M & T Bank Building
118 North Tioga Street - The Commons
Ithaca, NY 14850
Phone: (607) 256-2000 · Fax: (607) 273-2609
e-mail: bpm@bpmlegal.com