1
John S Martin, John H Hapgood, Clarence Rash, Parley P Johnson: Solar powered aircraft warning device. William Randolph, Anthony T Lane, John F Moran, July 16, 1996: US05537111 (18 worldwide citation)

A solar-powered, illuminated aircraft warning marker for connection to suspended cables and overhead transmission lines includes a polygonal housing having a plurality of light elements attached to different sides of the housing. The warning marker includes solar cells, storage batteries and electri ...


2
John H Hapgood: Video highlight attenuation processor. The United States of America represented by the Secretary of the Army, William G Gapcynski, Sherman D Winters, Werten F W Bellamy, July 22, 1980: US04214272 (3 worldwide citation)

A video highlight attenuation processor is disclosed which comprises an it circuit from which first and second signals corresponding to an input signal are derived, a peak detecting and inverting circuit which detects and inverts peak portions of the first signal to produce an intermediate signal, a ...