Did You Know...
...Chester Carlson was a patent agent who tired of having to make multiple copies of patent applications using the only duplication method available at the time: carbon paper. In 1959 he came up with a new copying system and took it to IBM for evaluation. The "experts" at IBM determined potential sales to be only 5,000 units because people wouldn't want to use a bulky machine when they had carbon paper. Carlson's invention was the xerography process, the company founded on the system is Xerox.
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| Number | Title | Issue Date |
| 6948215 | Window balance A threaded follower mounted on a spiral rod is attached to the first end of a torsion spring, the second end of the torsion spring being connected to a window sash, one end of the spiral rod being attached to a window frame by a gear box that prevents rotation of th... | 09/27/2005 |
| 6934998 | Sash balance shoe jamb attachment A sash balance shoe that draws an extending cord to the shoe by an elastic mechanism in the shoe is hung from a wall of a vertical track of a window jamb by the cord extending through the axis of a convex face of a radially extending annular wall that is on one end ... | 08/30/2005 |
| 6892494 | Lock shoe system A window balance shoe includes a downward depending pivoted arm that locks the height of the shoe on the jamb by catching in an opening in the jamb wall, or rotates out of the opening in the jamb wall and extends in a curved arm having a radius from the arm's pivot,... | 05/17/2005 |
| 6826878 | Window shim A threaded collar is rotatably, axially extended to the inner surface of an opening in a wall for receiving a window, from a collar that is fixedly mounted in the window's jamb, and the rotatable collar is fastened to the inner surface by a screw that extends axiall... | 12/07/2004 |
| 6817631 | Septic system box pipe seal A seal plate includes tear out sections that leave pipe sealing openings, an externally threaded cylindrical portion that extends through a hole in a septic system distribution box wall, a resilient cup-shaped flange that faces one side of the wall around the hole, ... | 11/16/2004 |
| 6789776 | Cast-in anchor attachment apparatus An anchor having an internally threaded first opening, a body, a first end on the body threaded to fit the first opening, a second end on the body, configured to fit an opening in the wall of the mold for extending a first length of the body into the wall, a second ... | 09/14/2004 |
| 6781303 | Mercury vapor lamp amalgam target A mixture of indium metal and titanium metal is fused to the inner surface of a quartz envelope of a mercury vapor discharge lamp. ... | 08/24/2004 |
| 6745517 | Leaf repellant gutter bracket A one-piece molded body includes a horizontal arm that extends into a concave longitudinal recess at the front of the roof of a leaf repellant rain gutter, a vertical arm that contacts the back wall of the gutter and contacts the bottom wall of the trough of the gut... | 06/08/2004 |
| 6691975 | Concrete tank seal cast A closed end of a one piece flexible elastomeric seal is mounted in one end of a tubular liquid concrete tight frame that is mounted on a removable door of one wall of a concrete wall mold, the other open end of the flexible seal is in liquid concrete tig... | 02/17/2004 |
| 6692309 | Mercury vapor lamp electrical connector A connector includes a tubular wall on a first body containing a lamp envelope, coaxially receiving an insulating tube mounted on a second body having a cavity that receives the first body, spring metal strip terminals on the outside of the tubular wall i... | 02/17/2004 |
| 6666349 | Septic system tank A septic system tank vertical wall has vertically overlapping grooved rings having specific diameters for receiving existing sealing couplers for septic system pipe. One wall of the groove has portions at different angles from the wall. The grooves are at... | 12/23/2003 |
| 6614602 | Method of manufacturing lens cap for transistor outline package A method of manufacturing a lens cap (40) for a transistor outline package includes the steps of: (a) providing a main part (2) of the lens cap; (b) providing an upper and lower molds (51, 52) and putting the main part into the molds; (c) closing the mold... | 09/02/2003 |
| 6609718 | Seal for casting in a concrete wall of a fluid distribution system container In molding a seal in a concrete wall, the front end of a tubular element is inserted between an outer tubular wall which forms part of the opening in the concrete wall and a conical seal that is integrally molded with the outer tubular wall. The tubular e... | 08/26/2003 |
| 6558064 | Ring binder sheet positioner A springy panel bridges the ring mechanism housing. It is mounted on the ring halves so that when the ring halves close they cam the panel up the lower curve of the segments, and bow the panel upward away from the ring mechanism housing cover. An element ... | 05/06/2003 |
| 6460860 | Pipe seal for cast concrete A tubular wall sealed at a first end by an integrally molded annular wall, forming a cap, is cast in the concrete wall of a low pressure vessel, forming a sealed cavity in the concrete. One end of a rubber tubular gland wrapped sealingly around the outsid... | 10/08/2002 |
| 6450505 | Seal for casting in a concrete wall of a fluid distribution system container In molding a seal in a concrete wall, the front end of a tubular element is inserted between an outer tubular wall which forms part of the opening in the concrete wall and a conical seal that is integrally molded with the outer tubular wall. The tubular e... | 09/17/2002 |
| 6451239 | Process of making a hook fastener using radio frequency heating A method for forming hooks for a hook and loop fastener on an item extending from a portion of the item, forming the hooks with the item from material of the item that is melted into tubelets bent to an included angle of less than 90 degrees, by heat gene... | 09/17/2002 |
| 6415826 | Apparatus for inserting mortar in masonry construction A container that is filled from one end with mortar includes a flexible tube at the other end that is elongated in cross section and open at one end. A shoulder on the container is spaced from the opening about the distance of the height of an opening bet... | 07/09/2002 |
| 6405498 | Insulating glass spacer channel seal A cutout is made on the front wall of a substantially straight portion of spacer frame channel, having an apex at the axis of bend of the channel for making a corner of the frame, the edges of the cutout being angled so that they close down to a slot of a... | 06/18/2002 |
| 6398748 | Splint bandage and method A non-radio frequency energy sensitive sheet shaped to cover a palm and wrist is wrapped over a radio frequency energy sensitive sheet, a splint, attachment strap first ends, and a rod configured to receive the other ends of the attachment straps around t... | 06/04/2002 |
| 6385938 | Space for concrete reinforcement rods A pair of curved arms attached to a body form an annular seat for holding a first diameter rebar, a slot through the outer diameter of the body forms a radially inward pathway to the seat for rebar, the apex of a convex bar attached to the body is yieldab... | 05/14/2002 |
| 6357951 | Loose-leaf binder assembly A cavity formed in a plate of a spine of a loose-leaf binder is open at the front of the cavity toward the back of the spine and is configured to hold a nut and prevent rotation of the nut in the cavity and to receive a threaded screw clearingly of the sc... | 03/19/2002 |
| 6341465 | Corner reinforcement for frame channel A corner element includes first and second sections that fit into legs of a framing channel, a first pair of parallel vertical panels on the first section interleave with a second pair of vertical parallel panels on the second section when the sections ar... | 01/29/2002 |
| 6244189 | Machine guide and propulsion system for variable geometry surface A carriage wheel and track upon which the wheel runs include meshed ridges and grooves oriented longitudinally with the track at the tangency of the wheel with the track, and force urging the track toward the wheel is applied to the track by a counter for... | 06/12/2001 |
| 6223982 | Impact resistant mailbox support A mailbox post includes a movable joint, an elastic element connected to said post at two locations, one on each side of the joint, supportive against tension force between the two locations and connected to the post at a third location between the two lo... | 05/01/2001 |
| 6209749 | Gas cylinder safety shield A lower portion of a shell is slidable along the length of the body of a gas cylinder, the upper portion of the shell is larger than the lower portion and includes a wall extending fixedly from the lower portion configured to laterally surround the valve,... | 04/03/2001 |
| 6149436 | String art device A plurality of layers of thread, each sculptured by stringing, each higher layer strung around a larger diameter opening, forming a portion of a wing, and so strung symmetrically, forming a pair of wings, and forming a butterfly sculpture.... | 11/21/2000 |
| 6115884 | Window balance In a counterbalance having a torsion spring which is torqued by a thread follower rotated by axially reciprocal movement of a spiral rod through the follower and into the torsion spring, the pitch of the spiral thread changes continuously, smoothly and co... | 09/12/2000 |
| 6094874 | Window mount system An extruded rail adjacent to the glazing in a window has a pair of integrally extruded receivers adapted to attachingly receive predetermined window glazing bead brackets which are each adapted to mate with the receivers. The glazing can be installed from... | 08/01/2000 |
| 6015488 | Filter system for septic tank A filter housing having a bracket for attaching the housing to a septic tank outlet port and adapted for fluid flow connection to an outlet port on the housing, contains a removable filter element having an outlet port connected to the outlet port on the ... | 01/18/2000 |
| 5983074 | Remote command, control and monitoring of apparatus by way of existing paging service network A plurality of radio pagers which can perform apparatus related tasks and which include the same unique pager address ID code, emulate to an available commercial paging service a single pager having the unique pager address ID code, in responding with an ... | 11/09/1999 |
| 5967690 | Loose-leaf binder A ring capture mechanism of a loose-leaf binder includes a first plate having a U-shaped slot of continuous circumference designed to receive a ring of the binder through the slot within the circumference. The first plate moves across a second plate havin... | 10/19/1999 |
| 5951190 | Pocket loose-leaf binder A die-cut sheet of material is folded in three and clamped by a ring binder mechanism so that two panels formed by the folding are pressed to a third panel that is between the folds, forming a binder cover leaf on each side of the mechanism. The ends of t... | 09/14/1999 |
| 5941571 | Pocket liner In an element for a book which includes a sheet having a slit configured for receiving an item through the sheet, the improvement includes the slit going to two folds of the sheet along fold lines that are transverse to the slit, the folds being at angles... | 08/24/1999 |
| 5938241 | Loose-leaf binder A plurality of U-shaped springs are hingedly attached by the arms of the U to a pair of covers forming a hinge on each cover and a channel configured to receive an article in the channel through the hinges.... | 08/17/1999 |
| 5927898 | Method for installing a septic tank in soil A septic tank adapted for burial in soil includes a movable anchor that extends near the bottom of the tank to hold the tank in the soil.... | 07/27/1999 |
| 5915874 | Book pocket in-fold attachment A panel attached to a book on foldable extensions by which the panel can be positioned next to the book and at various heights within the book and maintain the same orientation at each position, has a slot configured to receive an object through the panel... | 06/29/1999 |
| 5892444 | Alarm system for a card holder A flexible resilient ribbon having first and second conductive surfaces is wrapped over the top edge of a pocket wall forming a bowed-out first conductive surface adjacent to the top edge of the wall which biases the first conductive surface into contact ... | 04/06/1999 |
| 5881498 | Tilt and turn window lock system In a multi-position window that has a window sash that is rotatable out of the window frame on at least two different axis on pivots which are changed by a drive train on the sash moving to positions, the improvement includes one of a spring driven bolt a... | 03/16/1999 |
| 5881525 | Window screen frame A screen frame formed from a metal sheet in a single unit folds and locks on V-cuts in a tube by a locking mechanism that is configured to engage in crossed directions by the folding.... | 03/16/1999 |
