1
Patrick T Hunt: Cold weather breathing mask. Kokjer Kircher Bradley Wharton Bowman & Johnson, June 9, 1987: US04671268 (18 worldwide citation)

A cold weather breathing device which heats and humidifies air to be breathed. A face mask which covers the mouth and nose includes intake and exhaust ports each equipped with a one way valve. An open sided conduit which is U-shaped in section extends in opposite directions from the mask along oppos ...


2
Patrick T Hunt: Mailbox. Kokjer Kircher Bradley Wharton Bowman & Johnson, March 17, 1987: US04650113 (13 worldwide citation)

A mailbox has the usual hinged door on the roadside end and a special hinged cover which normally closes a back access opening through which mail may be removed. The back access opening extends through the top, back end and both sides of the mailbox to facilitate access to the mail when the cover is ...


3
Patrick T Hunt: Cold weather breathing mask. Lowe Kokjer Kircher Wharton & Bowman, May 26, 1981: US04269183 (12 worldwide citation)

A method and device for use in breathing where the ambient temperature is uncomfortable is the subject of the present invention. An air intake conduit is enclosed by a sack and communicates with a face mask that covers the nose and mouth of the wearer. Both the intake conduit and the enclosing sack ...


4
Patrick T Hunt: Combination heat exchanger breathing aid and muffler. Kokjer Kircher Bradley Wharton Bowman & Johnson, September 25, 1984: US04473071 (8 worldwide citation)

A breathing device which provides for heat exchange relationship between exhaled air, body heat and inhaled air is the subject of the present invention. A mask is utilized to cover the mouth and nose of the wearer and this mask has an air intake port which is coupled with an air intake conduit. The ...