Gijsbert Prast

Solar collector comprising solar tracking means

Device for performing measurements on a transparent object, method of manufacturing a fiber and fiber manufactured by means of said method

Pressing block for die pressing thermoplastic material

Cold transport line

Single lens having one spherical and one aspherical refractive surface

Method of absorbing thermal energy at low temperatures and apparatus for carrying out such methods

Device for producing very low gas pressures

Einzellinse mit einer sphaerisch und einer asphaerisch brechenden oberflaeche Single lens with a spherically and an aspheric refracting surface

Die-pressing device for the manufacture of records

Pressvorrichtung zur herstellung von kunststoffgegenstaenden, insbesondere schall- und bildplatten Pressing device for manufacturing kunststoffgegenstaenden, in particular sound and image plates