Schematic and craft printout of the Friszco Convertible Rotorcraft! I can not find any reference to this craft ever being produced, so I believe this was an experimental craft proposal, which would make sense as this came from the estate of a long-time employee of aerospace companies and other well known companies such as Hiller Helicopters!
Aerial Survey, Photographic Missions
Amphibious Capability With Scuba Support
Forestry, Fire Fighting
Surface Vehicle For Road or Snow
Air Boat for Swamp
You get the 30 x 35 inch schematic, with some pencil drawings on it, and a six page report on the Friszco Convertible, it looks like the inventor's name is J.O. Frisz, 1994.