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..
Developed in the mid-19th century, the pith helmet, made of pith or cork, was often worn by Europeans in the tropics. Military applications in the 19th-20th centuries saw a number of leather helmets, particularly among aviation and tanker crews in the early 20th century.