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  2. Envelope - Wikipedia

    en.wikipedia.org/wiki/Envelope

    Paper envelopes were developed in China, where paper was invented by 2nd century BC. Paper envelopes, known as chih poh , were used to store gifts of money. In the Southern Song dynasty, the Chinese imperial court used paper envelopes to distribute monetary gifts to government officials.

  3. Manila folder - Wikipedia

    en.wikipedia.org/wiki/Manila_folder

    This was historically the main material for manila folders, alongside the manila envelope and manila paper. Use. The manila folder is a folder designed for transporting documents. It is traditionally made of thick, durable manila paper and sized so that full sheets of printer paper can fit inside without folding. As with the manila envelope, it ...

  4. Windowed envelope - Wikipedia

    en.wikipedia.org/wiki/Windowed_envelope

    History. Americus F. Callahan of Chicago, Illinois, in the United States, received the first patent for a windowed envelope on 10 June 1902. Originally called the "outlook envelop", the patent initially anticipated using thin rice paper as the transparent material forming the window.

  5. Vacuum tube - Wikipedia

    en.wikipedia.org/wiki/Vacuum_tube

    The simplest vacuum tube, the diode (i.e. Fleming valve), was invented in 1904 by John Ambrose Fleming. It contains only a heated electron-emitting cathode and an anode. Electrons can flow in only one direction through the device—from the cathode to the anode.

  6. Postage stamp - Wikipedia

    en.wikipedia.org/wiki/Postage_stamp

    With the new policy of charging by weight, using envelopes for mailing documents became the norm. Hill's brother Edwin invented a prototype envelope-making machine that folded paper into envelopes quickly enough to match the pace of the growing demand for postage stamps.

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  7. Mail - Wikipedia

    en.wikipedia.org/wiki/Mail

    Mail envelope (back to back) The word mail comes from the Middle English word male, referring to a travelling bag or pack. It was spelled in that manner until the 17th century and is distinct from the word male. The French have a similar word, malle, for a trunk or large box, and mála is the Irish term for a bag.

  8. James Chalmers (inventor) - Wikipedia

    en.wikipedia.org/wiki/James_Chalmers_(inventor)

    526 Dundee Howff. Nationality. Scottish. Occupation. Inventor. James Chalmers (2 February 1782 – 26 August 1853) was a Scottish inventor (buried on 1 September 1853) who it was claimed, by his son, was the inventor of the adhesive postage stamps. [a]

  9. Francis Wolle - Wikipedia

    en.wikipedia.org/wiki/Francis_Wolle

    Francis Wolle. Francis Wolle (December 17, 1817 in Jacobsburg, Pennsylvania – 1893 in Bethlehem, Pennsylvania) was an American priest of the Moravian Church, inventor and phycologist. [1] Francis Wolle invented the first bag-making machine in 1851, forming the basis for the Union Bag and Paper Company. [2]

  10. Postage stamps and postal history of the United States

    en.wikipedia.org/wiki/Postage_stamps_and_postal...

    To be sure, the fragility of stamps made them unsuitable for hand-to-hand circulation, and to solve this problem, John Gault invented the encased postage stamp in 1862. A normal U. S. stamp was wrapped around a circular cardboard disc and then placed inside a coin-like circular brass jacket.

  11. Postage stamps and postal history of Great Britain - Wikipedia

    en.wikipedia.org/wiki/Postage_stamps_and_postal...

    The Great Post Office Reforms of 1839 and 1840 were championed by Rowland Hill, who is often credited with the invention of the postage stamp, as a way to reverse the steady financial losses of the Post Office.