...that to encourage use of his new invention, the shopping cart, market owner Sylvan Goldman hired fake shoppers to push the carts around his store in Oklahoma City? Seems his customers were reluctant to give up their hand-carried baskets.
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| Number | Title | Issue Date |
| 6367815 | Chuck A chuck for use with a manual or powered driver including a generally cylindrical body having a nose section and a tail section. The tail section defines an axial bore formed therein to mate with the drive shaft of the driver and the nose section defines ... | 04/09/2002 |
| 6364319 | Molded chuck A chuck includes an integrally molded body member having a nose section and tail section. A plurality of jaws are slidably positioned in angularly disposed passageways in the nose section. A nut is rotatably mounted on the body and is in engagement with t... | 04/02/2002 |
| 6279918 | Chuck Chuck for use with a manual or powered driver including a nut rotatably mounted on the chuck body and in engagement with the threads of the chuck jaws. The chuck includes a self-contained anti-friction bearing assembly disposed between the nut and a thrus... | 08/28/2001 |
| 6173972 | Locking chuck A driver includes a housing, a driveshaft rotatable with respect to the housing and a chuck. The chuck includes a generally cylindrical body and a nut rotatably mounted relative to the body so that relative rotation between the nut and the body moves the ... | 01/16/2001 |
| 6102411 | Chuck with locking sleeve A chuck includes a generally cylindrical body member having a forward section and a rearward section. The rearward section is configured to mate with a manual or powered driver. A plurality of angularly disposed passageways is formed in the forward sectio... | 08/15/2000 |
| 6079918 | Rotary power tool with hydraulically actuated chuck A rotary power tool has a remotely actuated chuck device. A hydraulic actuating system is incorporated in the power tool and is configured to move the chuck device between the gripping and release positions upon hydraulic fluid being supplied to at least ... | 06/27/2000 |
| 6079917 | Horizontal lever actuated chuck A rotary power tool is provided having a remotely actuated chuck device. The chuck includes an outer sleeve member that is axially movable relative to the drive spindle between a gripping and release position. A sleeve actuating device is provided having ... | 06/27/2000 |
| 6079916 | Rotary power tool with remotely actuated chuck A rotary power tool incorporates a remotely actuated chuck device. An engagement surface, such as a threaded or helical surface, is defined on an outer circumference of the chuck device over an axial length thereof. An actuator member is disposed concentr... | 06/27/2000 |