Congratulations to KM on their lastest patent, the exhaust valve system for underwater diving. This is the 8th patent KM has acquired from the USPTO since 2002. The others were for:
underwater viewing lens, bubble diverters for scuba and helmets, underwater valve system, facemask retaining system, automatic regulator, air/gas exchange system.
Funny thing is it all seems to be retreaded old technology that's been around since the 60s -70s rather than something new. At this rate no one will be able to make a helmet of any kind without infringing on KM patents and/or trademarks.
Oh and KM has trademarked Miller-Dunn, so will KM now claim that they've been making helmets since the 1800s because of Their Miller-Dunn trademark?