Did You Know...
...that one person who claimed to be the inventor of the television is Russian emigre Vladimir Zworykin? In 1929 David Sarnoff, founder of RCA, asked Zworykin what it would take to develop TV for commercial use. He said: a year and a half and $100,000. In reality, it took 20 years and $50 million! Before his death in 1982 at the age of 92, Zworykin said of his invention: "The technique is wonderful. It is beyond my expectations. But the programs! I would never let my children even come close to this thing."
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| Number | Title | Issue Date |
| 8096016 | Holder for holding a stick-shaped body so as to advance said body and combination of said holder and a stick-shaped body There is provided a stick-shaped body advancing holder or a combination of a holder and an eraser adapted to advance a stick-shaped body and to ensure chucking of the body or the eraser without enlargement of the entire configuration. A stick-shaped body advancing h... | 01/17/2012 |
| 7373691 | Eraser dispenser An eraser dispenser is provided which can store in a dispenser body an eraser longer than the overall length of the dispenser body. The eraser dispenser enables the eraser to be used without replacement with a new one for a long period of time. The eraser dispenser ... | 05/20/2008 |
| 7097375 | Mechanical pencil having a rotatable wheel for advancing lead A mechanical pencil is described. The mechanical pencil includes a grip barrel with a slide member to hold a piece of lead. A wheel is rotatably mounted in the grip barrel around a wheel axis, such that a portion of the wheel extends through and beyond an opening in... | 08/29/2006 |
| 6932531 | Writing assembly with eraser assembly A writing assembly includes a writing instrument having a first end with a marking point depending therefrom and a second, opposite end, and a cap having a first end with a receptacle defined therein and a second end, the first end of the writing instrument disposed... | 08/23/2005 |
| 6854158 | Erasing device This invention discloses an erasing device that can be held in the same manner as a writing instrument. The eraser is stored in a tube assembly and a rolling mechanism is used to slide the eraser out of the tube assembly for use. The rolling mechanism prevents the e... | 02/15/2005 |
| 5598604 | Pencil-shaped eraser A pencil-shaped eraser comprising an elongate tube for placing a bar eraser therein, a sleeve to fit around a lower portion of the tube movably, the lower portion of the tube having a plurality of claws divided by slots and movable inward, the claws respe... | 02/04/1997 |
| 5370471 | Writing tool, with eraser dispenser This invention is to a writing tool such as mechanical pencil or a ballpoint pen in which a writing shaft having a head member is inserted in an outer sleeve in such a manner that the head member projects from the outer sleeve. A stair or step and a spira... | 12/06/1994 |
| 5362166 | Flat stick-shaped material propelling container A stick-shaped material propelling container comprised of a flat-shaped outer sleeve, a chuck in the form of tweezers having a pair of opposing flat arms inserted into the outer sleeve and having a base in the rear portion thereof, and a chuck ring connec... | 11/08/1994 |
| 5345652 | Refill eraser A refill eraser comprises at least one refill member. Each refill member includes a holding barrel having a partition portion and a plurality of rotation-preventive ridges formed on an inner peripheral surface of its front portion, and an eraser body havi... | 09/13/1994 |
| 5236270 | Writing tool for advancing lead with eraser dispenser This invention is to a writing tool such as mechanical pencil or a ballpoint pen in which a writing shaft having a head member is inserted in an outer sleeve in such a manner that the head member projects from the outer sleeve. A stair or step and a spira... | 08/17/1993 |
| 5090831 | Writing instrument A writing instrument wherein a rear cap is rotatably connected through a connector to a rear end of an outer tube into which a core pipe is axially slidably inserted, a guide member for an eraser is axially slidably inserted into the rear cap for axial en... | 02/25/1992 |
| 5022774 | Writing tool with eraser dispenser This invention is to a writing tool such as mechanical pencil or a ballpoint pen in which a writing shaft having a head member is inserted in an outer sleeve in such a manner that the head member projects from the outer sleeve. A stair or step and a spira... | 06/11/1991 |
| 5018891 | Writing instrument with eraser dispenser A writing instrument wherein a rear cap is rotatably connected through a connector to a rear end of an outer tube into which a core pipe is axially slidably inserted, a guide member for an eraser is axially slidably inserted into the rear cap for axial en... | 05/28/1991 |
| 5015111 | Eraser dispenser and writing instrument equipped with eraser dispenser A pencil has front and rear barrels mounted on an inner barrel. The rear and inner barrels are axially displaceable as a unit relative to the front barrel to advance a lead, and the rear barrel is angularly displaceable in opposite directions relative to ... | 05/14/1991 |
| 4979254 | Eraser feeder An eraser mover for use with a power eraser comprising mechanical means for sliding the eraser out of its holder by inserting prongs into the eraser and moving the prongs outwardly.... | 12/25/1990 |
| 4904101 | Eraser dispenser and writing instrument equipped with eraser dispenser A writing instrument has an inner barrel defining a compartment for storing writing leads, an outer front barrel encircling a forward portion of the inner barrel and an outer rear barrel encircling a rearward portion of the inner barrel. The outer rear ba... | 02/27/1990 |
| 4856693 | Working out container of bar shaped article This invention relates to a container for feeding a bar shaped article such as an erasing gum, a pencil lead, a crayon, a pastel, or an eyebrow stick, especially for advancing or retracting the bar shaped article. A bar shaped article (8) is inserted into... | 08/15/1989 |
| 4352580 | Knock-out type mechanical pencil with retractable eraser A knock-out type mechanical pencil has a supporting rod mounted with an eraser at its rear end and axially slidably engaged within the interior of a cylindrical knock-button. A tubularly cylindrical weight is axially slidably engaged around the supporting... | 10/05/1982 |
