 The annular blowout preventer was invented by Granville Sloan Knox in 1946 who received a patent on September 9, 1952.1946 Tupperware

Tupperware is airtight plastic containers used for the preparation, storage, containment, and serving of perishable food in the kitchen and home.Tupperware was invented in 1946 by American chemist Earl Silas Tupper who devised a method of purifying black polyethylene slag, a waste product produced in oil refinement, into a molded substance that was flexible, tough, non-porous, non-greasy and translucent.