Mizuno Usa, Inc.

Richard Delvac

David Gregory Llewellyn

Chris Voshall

Kazuhiko Natori

Mamoru Saraie

Isamu Toshinari

Tomoaki Aoki

Chuck Couch

Damon Spencer

Masao Nagai

Yasuyuki Ohta

Tomo Aoki

Kazuhiku Natori

Bill Price

Iron-type golf club head

Iron-type golf club

Back design for hybrid golf club heads

Back design for an iron golf club head

The invention is directed toward a trial golf club head and method for determining the optimal loft angle for any golf club, and in particular a hybrid-type golf club. The invention includes a trial golf club head having a face portion, a leading edge portion, a toe portion, a heel portion, a back portion having a trailing edge portion, and a sole portion. The sole portion contains a number of equally spaced graduated indicia, which are substantially parallel to one another and extend from the toe portion to the heel portion. The distance between the graduated indicia is approximately 3.75 centimeters (cm), which corresponds to an incremental loft angle of approximately 3 degrees. The sole portion has a radius of curvature of 71.67 mm, which extends from the leading edge of the face portion to the trailing edge of the back portion.

Trial golf club for measuring loft angle and methods for using the same

Golf club wood head

Back design for a golf club iron head

Growing community of inventors

Lawrenceville, GA, United States of America

Richard Delvac