Who invented the Johnny Mop on a stick?

Dorothy F. Rodgers, wife of Richard Rodgers

http://oasis.lib.harvard.edu/oasis/deliver/~sch00878

Dorothy Feiner Rodgers - (1909-1992) Dorothy Feiner Rodgers was the wife of famous composer Richard Rodgers.

Her more famous invention is the "Jonny Mop". This mop is still manufactured. It is a small mop to clean toilets. Its most notable feature is the use of a disposable sponge on the "business end". She brought the mop to Johnson and Johnson. They attempted to market the invention, without paying her, by slightly changing Rodgers original mop.

http://www.pass.to/TGMegillah/thisnthatTV.asp?index=196