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.
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| Number | Title | Issue Date |
| 5127508 | Vending apparatus A vending machine comprises a plurality of receptacles mounted to a conveyor member, driven through a loop path by a drive shaft which engages the conveyor by gears, pulleys or other appropriate force transmitting devices, which driveshaft is connected to... | 07/07/1992 |
| 4840264 | Deposit system installation for trolleys The invention relates to a deposit system installation for transport trolleys. This deposit system comprises a locking line constituted by a substantially horizontal bar and deposit system apparatuses which are connected to the trolleys, whereby there is ... | 06/20/1989 |
| 4830168 | Coin and key operated cam lock A coin and key operated cam lock comprising a cam disc mounted for rotation wherein the cam disc has a lock barrel disposed therein. A cam lever and release bar engaging ramp is provided on the cam disc which also has a coin receiving slot therein. A cam ... | 05/16/1989 |
| 4732255 | Dispensing apparatus A dispensing apparatus 10 for elongate flat articles such as newspapers is described. The mechanism uses a rachet or pawl mechanism 36 or 36a to control a roller 23 or 23a rotatably mounted on a shaft 24 or 51 for dispensing the articles with the shaft an... | 03/22/1988 |
| 4715489 | Disk operated plastic bag dispenser A disk operated mechanism having two pivotable members spaced apart by an amount less than the diameter of the disk. A lever extends from one pivotable member. Co-operable stops on each pivotable member restrict pivoting of the members when the lever is m... | 12/29/1987 |
| 4440285 | Adjustable price setting mechanism for a vending machine A vending machine has a frame comprising a newspaper holding compartment with a spring hinged door and a housing for a mechanical control system secured to the top of the holding compartment. A vending member is secured to the door and operably engaged wi... | 04/03/1984 |
