Ltd.Polyethylene sheets and filmsUS4200360Mar 11, 1977Apr 29, 1980Mutzhas Maximilian FFilter for protection against radiation, especially with regard to direct pigmentation by solar radiationUS4320744May 15, 1980Mar 23, 1982Fodor Eben VSolar heated portable structureUS4498882Mar 8, 1983Feb 12, 1985Stearns Manufacturing CompanyHybrid personal flotation deviceUS4546493Sep 30, 1982Oct 15, 1985Bortnic