Whiteboard
Albert Stallion invented whiteboards while working at Alliance in the 1960s. Alliance (now known as PolyVision) produced enameled steel for architectural cladding, but Stallion noted it could also potentially be used as a writing surface. Stallion later left Alliance to form his own whiteboard production company, MagiBoards.
Clapperboard
The clapper (two sticks hinged together) was invented by F. W. Thring (father of actor Frank Thring), who was head of Efftee Studios in Melbourne, Australia. Some mention that Efftee was not founded until 1931, not in the 1920s as sometimes stated. However, the date of Efftee's founding does not assume the start of F.W. Thring's involvement in the industry. Consider the start of the Australian film industry with 1906's The Story of the Kelly Gang, which was the first feature length narrative film in the world. The director of this film, Charles Tait, was associated with J. C. Williamson. The former's production company, J. & N. Tait, merged with the J. C. Williamson Film Company. F.W. Thring was managing director of J.C. Williamson Films in 1918. The clapboard with both the sticks and slate together was refined by Leon M. Leon (1903–1998) a pioneer sound engineer.