...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 |
| 6968803 | Chart holder with priority scheduler and method of use A record holder and scheduler comprises a file container of sufficient size to hold a tangible record of a person or thing, the file container having front and rear faces. On the file container there is disposed a schedule indicator and/or a condition indicator. The... | 11/29/2005 |
| 6912968 | Schedule indicator A schedule indicator (14) is provided having a wall with a first selection arrow (13) and a base (16). The base has an annular bottom wall (18) with an annular array of upwardly projecting protrusions (20). The schedule indicator a... | 07/05/2005 |
| 6904129 | Twisted pair status indicator A twisted pair status indicator is provided. The twisted pair status indicator may be attached to a twisted pair access terminal to indicate whether the access terminal has available and properly functioning twisted pairs. The twisted pair status indicator may compr... | 06/07/2005 |
| 6789497 | Indicator for pill bottle The present invention discloses an indicator or numbering device for keeping track of the number of vitamins/medicine pills that one has taken. The present invention comprises a circular cover disk having a circular base plate disposed therein which plate is attache... | 09/14/2004 |
| 6561124 | Position indicator assembly for nuts and or bolts In order to provide a visible indication of loosening of a nut or a bolt relative to another member to which it is threadably engaged, a rotation indicator assembly comprises a first element, which is permanently secured to the nut or bolt and a second el... | 05/13/2003 |
| 6517376 | Positioning-sounding device for card puller A positioning-sounding device for a card puller, it generates a sound when an inserting and extracting member (an extended card) in the card puller is inserted in position to make sure that the member has been in position. Wherein, a sounding device is mo... | 02/11/2003 |
| 6024723 | Reminder device for blood self-testing A device is described for reminding a patient suffering from ailments such as diabetes and high cholesterol levels, who performs daily blood tests, of the site of the last blood extraction, in the case where blood is drawn from one or more sites of each f... | 02/15/2000 |
| 6016764 | Removably attachable automatic squeeze bottle utilization cycle counting device A removably attachable automatic squeeze bottle utilization cycle counting device comprises a squeeze bottle, a nozzle, a removable nozzle cap for isolating the nozzle from the outside environment and a hinged mechanism which attaches onto the squeeze bot... | 01/25/2000 |
| 6003467 | Dosage indicator A medication dosage indicator having two portions, a body portion and a cap portion. The body portion includes a circular top wall and a plurality of raised indicator tabs spaced apart in a circular fashion that have indicia corresponding to the day of th... | 12/21/1999 |
| 5975010 | Indicator Indicators and methods of indicating are disclosed. Intended primarily for use with medicine containers, the devices typically indicate the number of doses of medication ingested or remaining to be taken by a patient during a particular period. These devi... | 11/02/1999 |
| 5924639 | Line-type indicator for spool on a fishing reel A fishing reel having a frame and an operating mechanism on the frame. The operating mechanism includes a line canying spool with a first structure operable for directing line onto the spool. Settable structure on the spool can be placed selectively in at... | 07/20/1999 |
| 5860387 | Automatic squeeze-bottle utilization cycle counting device An automatic squeeze-bottle utilization cycle counting device in the form of a squeeze bottle, a bottle cap having a nozzle attached to the squeeze bottle and a removable nozzle cap hinged to the bottle cap for isolating the nozzle from the outside enviro... | 01/19/1999 |
| 5819597 | In-car rotation detecting apparatus A rotation detecting device which issues a plurality of code signals by a simple configuration so as to detect the rotational angle position and the direction of rotation of a rotor according to the code signals. The rotation detecting device has a knob m... | 10/13/1998 |
| 5732843 | Cover to be placed on a door of a receptacle to be sterilized Cover to place on a door (5) with unlocking by means of rotation as to slightly open it and making it possible to appropriately sterilize the entire inside of the receptacle it closes, whilst enabling bactericide vapors to easily reach the surfaces adjace... | 03/31/1998 |
| 5692452 | Dial A plate forming the lid of a housing for use in coaxial cable distribution systems has a first distribution port on one side and a second distribution port. A dial is mounted on the exterior of the plate which will indicate RF current flow and tap values.... | 12/02/1997 |
| 5692453 | Thermostat A rotatable knob for adjusting the temperature setting of a thermostat has a deformable tab that is permanently deformed upon rotational movement of the knob to a position that is indicative of a temperature setting greater than a predetermined optimum te... | 12/02/1997 |
| 5613463 | Numbering device A device for assigning numbers to products having casings, such as electronic calculators, has at least two digit wheels, each preferably having digits 0 through 9. One of the digit wheels is transparent, while the other may be opaque, with a light backgr... | 03/25/1997 |
| 5568787 | Line type indicator for fishing reel An apparatus for indicating line type on a fishing reel having a spool for storing a supply of fishing line and structure for wrapping the fishing line onto the spool to effect retrieval of paid out fishing line. The apparatus includes a rotatable dial or... | 10/29/1996 |
| 5492246 | Cup holder with counter assembly A cup holder with structure for counting the number of glasses of water drunk daily. It has a tubular body having an open top end for removably receiving a drinking cup. A C-shaped handle extends from the rear end of the tubular body. A counter assembly i... | 02/20/1996 |
| 5386795 | Combination pill bottle cap and indicator device A combination pill bottle cap and indicator device adapted to function as the closure or cover for a pill bottle or container. The device includes an indicator providing a visual indication for the user that a pill has been or should be removed from the b... | 02/07/1995 |
| 5356012 | Container with counter Container with counter comprising two cylindrical containers (1, 2) that one is placed coaxially inside the other, two saw-tooth structures (1a, 1b) and two sets of readings (1c, 1d) which are mounted on the outside surface of the inner cylindrical contai... | 10/18/1994 |
| 5280834 | Contact lens date storage container A storage container includes a base housing having first and second containers mounted to the housing. The base housing includes a cavity therewithin, having a rotatable dial projecting through a first side wall of the housing. The dial includes sequentia... | 01/25/1994 |
| 5148764 | VCR video keeper A video cassette recorder index device is provided and consists of a plurality of drums that are manually rotatable vertically within a housing. Indicia is printed onto tops of the drums so that a portion of the indicia can be viewed through small window ... | 09/22/1992 |
| 5103216 | Improperly inserted battery detector A deflectable battery retaining member in a battery powered unit blocks the improper insertion of a battery into the unit. Further, the same member in the absence of a battery inhibits engagement of the cover of the unit thereto providing a visual indicat... | 04/07/1992 |
| 5056454 | Utility locator A utility locator which is positioned on the surface, but which is capable of providing extensive information concerning the character and location of utility facilities, or other similar types of subsurface structures. More particularly, the present inve... | 10/15/1991 |
| 5055830 | Battery sensing mechanism A smoke detector with a visual battery missing indicator and a removable cover includes first and second locking prongs molded in the detector and directed toward the cover. A battery is positionable between the first and second locking prongs deflecting ... | 10/08/1991 |
| 4913083 | Method for reminding a person when to take medication A method for reminding a person when to take medication, is provided. A series of indicia are put on a plurality of flat areas about the circumference of the safety cap, which are in line with the interior stops of the safety cap. The indicia corresponds ... | 04/03/1990 |
| 4890572 | Measurement indicating gauge A gauge for indicating measurements including a dial plate provided with measurement scales, a central rotating shaft and an indicating plate. The dial plate is disposed in front of the indicating plate, with an arcuate slot opening formed in the dial pla... | 01/02/1990 |
| 4886010 | Clothing wear monitoring device There is disclosed a garment wear monitor for recording the number of times an article of clothing is worn. The monitor is removably or permanently affixed to a clothing hanger, or is removably affixed to the garment directly. Each time the garment is wor... | 12/12/1989 |
| 4561565 | Rate adjustment for chemical meter A material metering device having a discrete flow rate adjustment and indicator mechanism. The indicator includes an actuator knob which is rotated to adjust the flow rate of material from the meter. The actuator knob is also operably connected to a follo... | 12/31/1985 |
| 4545246 | Tire pressure indicating device A vehicle tire valve cap is disclosed incorporating a tire pressure indicator which can be set to indicate a pressure appropriate to given circumstances. The cap comprises two components (1,2). The top component (2) snap-fastens into the body component (1... | 10/08/1985 |
| 4470273 | Row counter In a knitting row counter, a settable member has a projection which can engage in a selected one of a number of recesses in a further member but is expelled from the recess on rotation of the settable member. A finger on the settable member engages in a g... | 09/11/1984 |
| 4446810 | Rotary indicator A dialable indicator comprising a lockable enclosure housing a rotatable drum. The outside surface of the drum is contoured to define a plurality of tag-holding stations. A window in the hinged cover of the enclosure allows viewing of one tag-holding stat... | 05/08/1984 |
| 4420264 | Structure for preventing the rotating of a register ring of a diver's watch A diver's watch having a watch case and a register ring which is rotatably mounted on the watch case to set a diving time. The register ring has a plurality of notches on the underside thereof and is urged by clicks made of spring plate and held by a hold... | 12/13/1983 |
| 4404543 | Down marker indicator for football competition An improved indicia display apparatus particularly useful for displaying indicia indicating the number of down to be played in football competition and locating the position of the ball along the sideline, for example, the apparatus comprising an opaque o... | 09/13/1983 |
| 4373466 | Storeroom bin marker A storeroom bin marker which includes a base member having indicia thereon, and a rotatable view blocking member which can be selectively rotated to cover some, all, or none of the indicia, to thereby indicate the supply or reorder status of a stocked ite... | 02/15/1983 |
| 4266770 | Blackjack 21 computer A hand held counter particularly adapted for counting cards during games of Blackjack. The counter includes two lever arms mounted for incremental rotation on a vertical axle in a cylindrical casing. The cylindrical casing includes a circular faceplate ha... | 05/12/1981 |
| 4203565 | Fishing reel spool locking knob This invention relates to conventional style and skirted style fishing reels wherein the spool flange edge that secures the spool to the center shaft is retained by the knob so that it does not fall away and separate from the spool.... | 05/20/1980 |
| 4127122 | Breathing apparatus A breathing apparatus for supplying air to a helmet and/or protective clothing comprises a base plate; a core body secured to the base plate; an air driving device supported by the core body; an air inlet and an air outlet for the air driving device; an e... | 11/28/1978 |
| 4086715 | Multiple rating device A device for indicating and surveying various types of services includes a housing having printed indicia rotatable drums mounted therewithin which display selected indicia according to the user's selection. Preformed indicia on the exterior of the housin... | 05/02/1978 |