DONALD KEITH MARSHALL
Pilots at Jay Ave, Las Vegas, NV
License number
Nevada A1196107
Category
Airmen
Type
Authorized Aircraft Instructor
Address
Address
5008 Jay Ave, Las Vegas, NV 89130
Professional information
Disposable Emergency Respirator
US Patent:
4669462, Jun 2, 1987
Filed:
Feb 7, 1984
Appl. No.:
6/577822
Inventors:
Donald K. Marshall - Las Vegas NV
International Classification:
A62B 700
US Classification:
12820525
Abstract:
The present invention comprises an elongated truncated cone-like thermoplastic tube which terminates at its base end in a ring that could be fitted over face of the wearer and held there by elastic bands, the lower end of the cone or trunk like tube terminating in a flexible ring which fits over an aerosol type container filled with compressed breathable gas.
Personal Undersea Observation Pedal Craft
US Patent:
7699017, Apr 20, 2010
Filed:
May 12, 2008
Appl. No.:
12/152202
Inventors:
Donald K. Marshall - Las Vegas NV, US
International Classification:
B63C 11/46
US Classification:
114315, 440 26, 440 31
Abstract:
A personal water craft propelled on the water's surface by the user pedaling a pedal crank that in turn rotates a propeller thrusting the craft in a forward or rearward direction. Steering is accomplished by an operator-controlled rudder at the aft of the craft. The craft is of unique design lending to persons who desire to snorkel observing undersea life in a comfortable prone position of appropriate pedal posture while enjoying the ease of navigating by pedal propulsion with less expenditure of effort than swimming.