About: http://webisa.webdatacommons.org/359431748

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	In April of 1950, he filed his patent for the Gyrostabilized Sighting Instrument for use with hand held instruments such as binoculars, sextants,cameras and the like.
http://www.w3.org/ns/prov#wasQuotedFrom	ken-lab.com