...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 |
| 7248366 | Method for marking defect and device therefor The defect marking method comprises the steps of: installing a surface defect tester to detect surface flaw and a marker device to apply marking at defect position, in a continuous processing line of steel sheet; detecting the surface flaw on the steel sheet using t... | 07/24/2007 |
| 7131895 | CMP pad having a radially alternating groove segment configuration A polishing pad (104) having an annular polishing track (122) and including a plurality of grooves (148) that each traverse the polishing track. Each groove includes a plurality of flow control segments (CS1–CS3) and at least two... | 11/07/2006 |
| 7094131 | Microelectronic substrate having conductive material with blunt cornered apertures, and associated methods for removing conductive material A microelectronic substrate and method for removing conductive material from a microelectronic substrate. In one embodiment, the microelectronic substrate includes a conductive or semiconductive material with a recess having an initially sharp corner at the surface ... | 08/22/2006 |
| 7094132 | Method of and apparatus for magnetic-abrasive machining of wafers A method of magnetic-abrasive machining of parts has the steps of supporting a part, generating a magnetic field by magnetic means located at one side of the part, placing a magnetic-abrasive powder on a surface located at another, opposite side of the part, so that... | 08/22/2006 |
| 7052363 | Method and apparatus for treating the surface of a media, such as a magnetic hard disk, while operating, such as during dynamic electrical testing A system and method for treating (e.g. polishing to remove defects) the surface of a media, such as a magnetic hard disk, while in operation, such as during dynamic electrical testing is disclosed. Further, a method for manufacturing a head for treating the surface ... | 05/30/2006 |
| 6958006 | Grinding machine In a cylindrical grinding machine, a lateral surrounding cover is mounted on a bed and surrounds and covers lateral surfaces of a machining area in which a work support drive device, a grinding wheel and a bearing unit therefor are arranged and a slide area in which... | 10/25/2005 |
| 6705936 | Large-width, angular-sided segmental superabrasive grinding wheel The present invention relates to an abrading tool having a rotatable body of revolution having an axis of rotation. A peripheral workface is fixedly attached to the body of revolution. The workface is formed by a plurality of discrete, geometrically-shaped segments ... | 03/16/2004 |
| 6692336 | Method for protecting underwater surfaces against pollution due to fouling, and brush and coating agent used therewith The invention relates to a method for protecting an underwater surface (3) against pollution due to fouling, in particular a metal surface, upon which a coating (4) is applied, whereby the coating (4), in the presence of water, is brushed or polished smoo... | 02/17/2004 |
| 6435953 | Coin cleaning apparatus A coin cleaning and grinding apparatus includes a conveyor for conveying coins, two drive rollers of urethane sponge having a urethane hardness between 70 and 90 degrees, and a pair of primary grinding rollers and a pair of secondary grinding rollers of u... | 08/20/2002 |
| 6328639 | System for abrasively cleaning small parts and a container for holding small parts undergoing abrasive cleaning A system for abrasively cleaning small parts, and a container for holding small parts undergoing abrasive cleaning. An abrasive cleaning cabinet has a bottom member and a cover hingedly connected to the bottom member. The cover is pivotable between a clos... | 12/11/2001 |
| 6309285 | Magnetic wiper A magnetic wiper for removing magnetorheological fluid from a carrier surface includes a horseshoe magnet having north and south polepieces elongated in a first direction orthogonal to a second direction of magnetic flux in the magnet. The polepieces are ... | 10/30/2001 |
| 6280294 | Polishing method, polishing device, glass substrate for magnetic recording medium, and magnetic recording medium There are disclosed a polishing method and a polishing device in which cleaning of a glass substrate surface can be achieved to a high level. A glass substrate (MD substrate 1) in the shape of a circular disc having a circular hole in a center portion is ... | 08/28/2001 |
| 6273788 | Sustained surface scrubbing The surface of a workpiece is treated by discharging a stream of pliant shot in a carrier fluid at a shallow angle of incidence thereagainst. The shot is then scrubbed laterally along the surface for selectively removing target material therefrom.... | 08/14/2001 |
| 6080047 | Procedure for the surface treatment of petrous materials A process for surface treating the surface of petrous materials comprises applying friction to the surface to be treated by means of brush bristles which produce progressive erosion of the surface wherein the erosion is of greater depth in zones of lesser... | 06/27/2000 |
| 6036580 | Method and device for magnetic-abrasive machining of parts Magnetic-abrasive machining of a parts is performed by generating a magnetic field by two different poles located near one another so as to form a magnetic gradient region with magnetic flux lines which extend from one pole in one direction and then in an... | 03/14/2000 |
| 5788779 | Chemical cleaning method for a clutch friction liner support disc, a workstation for carrying out the method, and an installation including such a workstation for adhesively fastening friction liners on a support disc A motor vehicle clutch has a friction wheel which includes a support disc, on which friction liners are attached by adhesive bonding to selected zones of the opposed faces of the support disc. These zones are prepared for application of the adhesive by su... | 08/04/1998 |
| 5782677 | Continuous process blast mill for finishing cast metal parts A workpiece cleaning mill that is useful for cleaning castings includes a hollow housing that is established by arranging plural elongated manganese flights side-by-side to establish a cylinder, and attaching the flights to opposed entrance and exit rings... | 07/21/1998 |
| 5727993 | Plastic flexible grinding stone The plastic flexible grinding stone according to the present invention comprises a plastic flexible material having mixed therewith a powder synthetic detergent and an abrasive such as silica sand and calcium carbonate composed of grains from 3 to 50 μm ... | 03/17/1998 |
| 5716262 | Marking apparatus for marking painted surface A marking apparatus for forming scratch marks on a painted surface, at positions in which paint defects are detected, includes a rotary brush assembly having a number of strings, each of which contains approximately 25 weight percent of abrasive grains, s... | 02/10/1998 |
| 5618223 | Method and apparatus for recycling sand An apparatus to remove adhering material from the surfaces of sand to recycle the sand is disclosed. The apparatus includes a container (13) to hold sand (S) to be processed, the container having a bottom opening; pressing means (17-20) to press the sand ... | 04/08/1997 |
| 5569061 | Method and device for magneto-abrasive machining of parts A method of and a device for magnetic-abrasive machining of parts has an external magnetic field providing a magnetic flux, a supply of a magnetic-abrasive powder to the part in the magnetic field. The part is rotated and oscillated about the longitudinal... | 10/29/1996 |
| 5476416 | Plastic flexible grinding stone The plastic flexible grinding stone according to the present invention comprises a plastic flexible material having mixed therewith a powder synthetic detergent and an abrasive such as silica sand and calcium carbonate composed of grains from 3 to 50 μm ... | 12/19/1995 |
| 5271186 | Tandem pneumatic/hydraulic reciprocating cylinder with integral oil reservoir The present invention relates to a tandem pneumatic/hydraulic reciprocating cylinder with an integral oil reservoir. The invention may be used to impart reciprocating motion to adjustable apparatus used in the cleaning and polishing of roll assemblies.... | 12/21/1993 |
| 4947940 | Apparatus and method for removing oil spots from a surface A vibrator apparatus adapted for rubbing absorbent granules against a surface to remove oil spots therefrom. The apparatus comprises a platen having a generally flat lower face for engaging the surface, and a power driven shaft rotatably mounted on the pl... | 08/14/1990 |
| 4417421 | Apparatus for polishing interior surfaces of pipes or the like A pipe polishing apparatus of the type in which a polisher rod is extractably inserted into a pipe to be polished and polishing grains are injected into a gap between the polisher rod and pipe while rotating the rod and pipe in opposite directions for pol... | 11/29/1983 |
| 4387537 | Deburring and cleaning machine and process A deburring and cleaning machine and process designed to successfully clean work pieces such as castings, machined parts, and the like. The machine is characterized by a freely open work piece mounting plate movable in a predetermined pattern while simult... | 06/14/1983 |
| 4174591 | Apparatus for cleaning sand cores Apparatus for removing fins or flash from foundry sand cores, including a conveyor transporting the sand cores, means mounted above the conveyor for delivering a falling curtain of core cleaning material, such as metal shot or metal grit particles, from a... | 11/20/1979 |
| 4160650 | Sand core cleaning apparatus with double roller delivery of cleaning material A core cleaning material delivery unit for use in removing fins from foundry sand cores, including counter-rotating rollers rotatably engaging and defining a contact surface junction, means for feeding core cleaning material, such as metal shot or metal g... | 07/10/1979 |