Internet-Only Manuals (IOMs) The Internet-only Manuals (IOMs) are a replica of the Agency's official record copy. They are CMS' program issuances, day-to-day operating instructions, policies, and procedures that are based on statutes, regulations, guidelines, models, and directives.
In 1905, Mogridge created the first crude protective head gear and was granted patent No. 780899 for a head protector.. This first attempt at a batting helmet was said to look like an inflatable boxing glove that wrapped around the hitters head..
Batting helmets have been mandatory for MLB players since 1956 and anyone reaching the big-leagues after 1983 must wear a helmet with an ear flap. Minor League players must wear flaps that cover both ears. Major League Baseball was played for more than half a century without any protection for the noggin.