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  2. Pencil case - Wikipedia

    en.wikipedia.org/wiki/Pencil_case

    A pencil case can also contain a variety of other stationery such as sharpeners, pens, glue sticks, erasers, scissors, and rulers. Pencil cases can be made from a variety of materials such as wood or metal. Some pencil cases have a hard and rigid shell encasing the pens inside, while others use a softer material such as plastic, leather or cotton.

  3. Glow plug - Wikipedia

    en.wikipedia.org/wiki/Glow_plug

    This device is a pencil-shaped piece of metal with an electric heating element at the tip. A glowplug system consists of either a single glowplug in the inlet manifold, or one glowplug per cylinder. In older systems, the driver is required to manually activate the glowplug system and wait approximately 20 seconds before starting the engine.

  4. Rubber-Tip Pencil Co. v. Howard - Wikipedia

    en.wikipedia.org/wiki/Rubber-Tip_Pencil_Co._v...

    The circuit court denied relief. [16] It said the patented article consists "of a piece of India rubber, with a hole in it." [17] The court stated: Such an article cannot be the subject of a patent The elastic and erasive properties of India-rubber were known to all . . . ; and how to make a piece of rubber encompass and adhere to another article, was known to every person who had ever seen a ...

  5. Pencil - Wikipedia

    en.wikipedia.org/wiki/Pencil

    The most common pencil casing is thin wood, usually hexagonal in section, but sometimes cylindrical or triangular, permanently bonded to the core. Casings may be of other materials, such as plastic or paper. To use the pencil, the casing must be carved or peeled off to expose the working end of the core as a sharp point.

  6. Mechanical pencil - Wikipedia

    en.wikipedia.org/wiki/Mechanical_pencil

    A mechanical pencil or clutch pencil is a pencil with a replaceable and mechanically extendable solid pigment core called a "lead" / ˈ l ɛ d /. The lead , often made of graphite , is not bonded to the outer casing, and the user can mechanically extend it as its point is worn away from use.

  7. Sampson Mordan - Wikipedia

    en.wikipedia.org/wiki/Sampson_Mordan

    Silver mechanical pencil Catalogue from 1898 Sampson Mordan (c. 1790 – 9 April 1843) was a British silversmith and a co-inventor of the first patented mechanical pencil . During his youth, he was an apprentice of the inventor and locksmith Joseph Bramah , who patented the first elastic ink reservoir for a fountain pen .

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