Famous Patents
3M employee and church chorister Art Fry needed something to temporarily mark pages in his hymnal. He was in luck because his colleague, Spencer Silver, accidentally developed a glue that was too weak for other purposes. After initially discouraging consumer response, Post-it Notes became a hit in 1979.
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| Number | Title | Issue Date |
| 6761184 | Water flushing unit for a pressure balanced shower valve A water flushing unit and a method of making such comprising a cover plate that is to be mountingly installed to replace the original equipment cover plate of a shower valve. The modified cover plate has a drain conduit which includes an on/off valve. The on/off val... | 07/13/2004 |
| 6223768 | Dust cover An outlet dust cover, for attachment to a back plate having a wall plate formed to include an aperture within which a valve controlling gas flow in a pipe is received, includes a plate, a valve actuator located in the plate and arranged to be positioned a... | 05/01/2001 |
| 6164317 | Sewer pipe cover assembly A cover assembly for a sewer vent pipe having a dome-shaped cap member with a plurality of brackets affixed to the inner surface thereof and extending to surfaces in a common plane for supporting the cap upon the open, upper end of the sewer pipe. A circu... | 12/26/2000 |
| 4408631 | Wedge-type tap for the sterile sampling of liquids A faucet plug is disposed in a housing transversely to a tank wall so as to be rotatable about its longitudinal axis and is fixedly connected with its end portion outside of the tank to a bent discharge pipe, and a through-passage extends in the longitudi... | 10/11/1983 |
