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 |
| 5167588 | Hydrostatic two-way-variable-speed drive A drive comprising a first group of cylinders of a radial hydraulic pump, rotating in relation to the drive frame about a first axis, and torsionally integral with the input shaft of the drive and with a housing inside which the first group of cylinders r... | 12/01/1992 |
| 5013514 | Process for the construction of hollow monolithic elements of composite material, particularly carbon fibres The process makes use of a lost core of polystyrene, on which are wrapped and compacted, in successive stages, various sheets or mats of carbon fibre, of known type; a first compaction is effected in an autoclave after having sealingly wrapped the core, b... | 05/07/1991 |
| 4916978 | Differential device of the limited slip type The device comprises first and second planet wheels having a common axis, first and second pairs of first satellite gear wheels meshing respectively with the first and second planet wheels, the two gear wheels of each of the said pairs being rotatable on ... | 04/17/1990 |
| 4874201 | Support and guide structure for the windows of a motor vehicle body The structure comprises a pair of support elements for the window each of which has an abutment tongue which can be contacted by part of the rear surface of the window, a frame tongue orthogonal to the first and adapted to surround the lateral edge of the... | 10/17/1989 |
| 4869539 | Supporting structure for a motor vehicle A support structure for a motor vehicle that includes a passenger compartment and is resiliently connected to the vehicle wheels by front and rear suspensions. The structure includes a central frame which defines the passenger compartment of the vehicle. ... | 09/26/1989 |
| 4811812 | Rear frame forming part of a supporting structure of a motor vehicle The rear frame is resiliently connected to a central frame of the support structure and is adapted to support the engine and some of the members of the transmission and is resiliently connected to each rear wheel of the motor vehicle; this frame substanti... | 03/14/1989 |
| 4811970 | Front frame forming part of a supporting structure of a motor vehicle The front frame is resiliently connected to a central frame of the motor vehicle supporting structure and is resiliently connected to each front wheel by means of a resilient suspension; this frame substantially comprises a plate engageable against the en... | 03/14/1989 |
