Bridgestone Golf would prefer that golfers focus on changing their wedge’s bounce to suit the course conditions. They recently had a patent application publish as US Pub. No.  1. Field of the Invention
 The present invention relates to a clubhead of an iron golf club and more particularly to a clubhead of an iron golf club which has a head main body which includes a face surface and a hosel portion and a back member which is detachably attached to the head main body and in which a sole bounce angle and a sole shape can be changed by changing back members.
 An object of the invention is to provide a clubhead of an iron golf club in which not only a sole bounce angle but also the shape of a back portion can be changed and in which the sole bounce angle can be changed repeatedly.
Back in 2010 I wrote about a Nike Golf design that would allow a golfer to switch their cavity back irons to muscle backs irons. The Nike patent application discussed in the post actually issued as USPN It is to be appreciated that all aspects of the geometry or mass properties of club head 14 can be modified through the use of the interchangeable body component including, but not limited to, the club head’s shape, weight, weight distribution, bounce angle, center of gravity, moment of inertia, material of which it is formed, and appearance, which can alter the center of gravity, moment of inertia, and/or other “feel” characteristics of club head 14.
It is hard to imagine that we will ever see either the Bridgestone or Nike designs on the market, but you never know in today’s competitive marketing driven golf environment.
Dave Dawsey – Monitoring Golf Wedge Inventions