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 |
| 7648282 | Spherical bearing arrangement A spherical bearing arrangement comprising: a bearing housing; a plurality of split-ball portions which are together arranged in the housing to produce a composite ball having a spherical bearing surface, the composite ball having a bore passing therethrough, the bo... | 01/19/2010 |
| 7246563 | Pivot assembly for planter closing wheel frame A pivot assembly is provided for attaching a closing wheel frame to a planter. The closing wheel frame has a pair of closing wheels attached at a rear end and a pair of mounting openings formed at a front end. The pivot assembly includes ball bearings having outer r... | 07/24/2007 |
| 6918343 | Pivot assembly for planter closing wheel frame A pivot assembly is provided for attaching a closing wheel frame to a planter. The closing wheel frame has a pair of closing wheels attached at a rear end and a pair of mounting openings formed at a front end. The pivot assembly includes ball bearings having outer r... | 07/19/2005 |
| 6350060 | Dual load path spherical bearing and a method of coupling along a dual load path A dual load path spherical bearing (10) comprises a bearing race (12) and a bearing ball (14). The bearing race (12) comprises a bearing race first half (16) and a bearing race second half (22) adapted to interface with the bearing race first half to form... | 02/26/2002 |
| 5484211 | Self-aligning flanged bearing A one-piece, self-aligning bearing is disclosed which includes a cylindrical bearing sleeve of uniform thickness having an outwardly convex hemispherical flange projecting from a first end of the sleeve and arching longitudinally toward an opposite second... | 01/16/1996 |
| 4077681 | Self-adjusting bearing A spherical bearing assembly having an inner race member and an outer race member, the inner surface of the outer race member being a concave spherical surface, the outer surface of the inner member being a complementary convex spherical surface, the inne... | 03/07/1978 |
| 3989321 | Spherical bearing assembly with spring biased segmented inner race member A spherical bearing assembly having an inner race member and an outer race member, the inner surface of the outer race member being a concave spherical surface, the outer surface of the inner member being a complementary convex spherical surface, the inne... | 11/02/1976 |
