An interesting little ratcheting screwdriver I found recently, with a pistol grip and interchangeable bits:
Patent No. 962057 does not correspond to any U.S. or Canadian patents for such screwdrivers. (The US patent with this number is for a "racing apparatus" issued in 1910, the Canadian one for a signboard issued in 1975.) Perhaps it's British, but that country has not made its patent database easily available on the web.