Read Umpire Related Patents
 

This guy's idea was ahead of my time!
The Umpire's strike zone mask
Umpire's strike zone mask - Patent 5394564
http://www.freepatentsonline.com/5394564.html

Wish I had the time to look through all the pictures.
Each patent you open list other similar products of interest with US patents.
Perhaps you may find something else of interest.

Baseball catcher's mask
Baseball catcher's mask - Patent 6983487
http://www.freepatentsonline.com/6983487.html
Check out the patent history timeline.

Umpire search results. This is a must read to find some way COOL umpire related stuff!
http://www.freepatentsonline.com/res...sort=relevance

Hope you enjoy!