Did You Know...
...that while attempting to develop a super strong glue, 3M employee Spencer Silver accidentally developed a glue that was so weak it would barely hold two pieces of paper together? However, his colleague Art Fry needed the glue. Fry sang with his church choir and marked the pages of his hymnal with small scraps of paper that often fell out. He used Silver's glue to hold the papers in place. Today we call this invention Post-it Notes.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 5237934 | End cap gate sampling device The present invention is a control device that allows an operator to partially open a gate valve found at the bottom of a railway freight car hopper in order to obtain a sample of a flowable particulate or granular product contained within the hopper but ... | 08/24/1993 |
| 4964348 | Drop end, open top rail car A pivoted drop end for a railway car which is adapted to be manipulated (lifted) by power equipment in the car to open or close the car end. The car end includes lower side posts, each having a cam follower running in a cam on the car frame which swings t... | 10/23/1990 |
| 4843974 | Hopper car with automatic discharge door mechanism A railroad hopper car having bottom discharge doors, an elongated beam assembly along the bottom of the car, door operating levers to open and close the doors connected to the beam assembly and doors, and lost motion timing connections in the beam assembl... | 07/04/1989 |
| 4766820 | Hopper car with automatic discharge door mechanism A railroad hopper car having bottom discharge doors, an elongated beam assembly along the bottom of the car, door operating levers to open and close the doors connected to the beam assembly and doors, and lost motion connections in the beam assembly which... | 08/30/1988 |
| 4688488 | Automatic actuating and locking apparatus for the hopper doors of a railroad hopper car Apparatus for actuating and locking the hopper doors of a hopper car of the type having a center sill of inverted U-shaped cross section and a plurality of hopper doors extending transversely of the center sill. The hopper doors can be arranged singly to ... | 08/25/1987 |
| 4163424 | Hopper door locking and actuating mechanism Both an operating link and a locking hook member are secured on a shaft rotatably mounted on a hopper door. The hook member cooperates with a locking lug fixed relative to the hopper for securing the door closed. The operating link is both pivoted and pus... | 08/07/1979 |
| 3958514 | Automatic hopper gate locking mechanism A gravity outlet suitable for hoppers is provided comprising a gate movable back and forth between open and closed positions. A locking shaft is mounted on the gate having handles on at least one side of the outlet and having a locking member preferably h... | 05/25/1976 |
