Sinclair Radionics was created in 1961.
Your Sinclair was created in 1983.
Sinclair Breweries was created in 1988.
Sinclair Sovereign was created in 1976.
Sinclair Research was created in 1973.
Sinclair BASIC was created in 1979.
Sinclair User was created in 1982.
Grayson Sinclair was created in 2006.
Sinclair Oxford was created in 1975.
Sinclair Scientific was created in 1974.
Sinclair Cambridge was created in 1973.
Sinclair Baronets was created in 1786.
Sinclair-Lockhart Baronets was created in 1636.