1
Dunning Fred R: Inflatable padding for football helmet or the like. October 2, 1973: US3761959 (85 worldwide citation)

An inflatable padding for attachment to the interior surface of a helmet, for protecting the head of a participant in a sporting event, such as a football game. The inflatable padding comprises a plurality of inflatable bag-like means or members adapted for positioning about the head of the wearer, ...


2
Dunning Fred R: Football facemask. Baldwin Egan Walling & Fetzer, December 17, 1974: US3854146 (25 worldwide citation)

A football facemask of one-piece construction formed of a base material such as aluminum coated with a suitable plastic-like coating. The facemask has a four-point resilient attachment to a football helmet capable of substantially absorbing shock and thus preventing injury to the player.


3
Dunning Fred R: Attaching means for a facemask. Baldwin Egan Walling & Fetzer, August 26, 1975: US3900897 (6 worldwide citation)

A resilient attachment for a football facemask of one-piece construction formed of a base material such as aluminum and coated with a suitable plastic-like coating. The facemask is resiliently attached to a football helmet by the attaching means and capable of substantially absorbing shock effective ...