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..
The next big evolutionary leap occurred in 1939, when the first football helmet was made from plastic. While the initial design looked very similar in size and shape to the leather helmets used at the time, the plastic helmet (eventually) had several advantages over its leather counterpart: