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2. Electric pen - Wikipedia

   en.wikipedia.org/wiki/Electric_pen

   The electric pen was the key component of a complete duplicating system, which included the pen, a cast-iron holder with a wooden insert, a wet cell battery on a cast-iron stand, and a cast-iron flatbed duplicating press with an ink roller.

3. Tattoo machine - Wikipedia

   en.wikipedia.org/wiki/Tattoo_machine

   The predecessor to the tattoo machine was Thomas Edison's electric pen, patented under the title Stencil-Pens in Newark, New Jersey, United States in 1876. [2] It was originally intended to be used as a duplicating device, but in 1891, Samuel O'Reilly discovered that Edison's machine could be modified and used to introduce ink into the skin ...

4. Power tool - Wikipedia

   en.wikipedia.org/wiki/Power_tool

   The introduction of the electric motor (and electric distribution networks) in the 1880s made possible the self-powered stationary and portable tools we know today. [18] The global market for power tools is $33 billion (in 2016) and estimated to reach $46 billion in 2025.

5. Process of tattooing - Wikipedia

   en.wikipedia.org/wiki/Process_of_tattooing

   In 1891 the first electric tattoo needle was patented in New York City by Samuel O'Reilly, who modified Thomas Edison's electric engraving pen. [3] O'Reilly's machine was based on the rotary technology of the electric engraving device invented by Thomas Edison. [4] Modern tattoo machines use electromagnetic coils.

6. Technical pen - Wikipedia

   en.wikipedia.org/wiki/Technical_pen

   Staedtler technical pens Staedtler technical pen divided in parts in comparison with 1 cent euro coin Macro image of a 0.7 mm Rotring Rapidograph nib showing the flow control wire. A technical pen is a specialized instrument used by an engineer, architect, or drafter to make lines of constant width for architectural, engineering, or technical ...

7. Digital pen - Wikipedia

   en.wikipedia.org/wiki/Digital_pen

   A smart pen has the same basic characteristics as a digital pen, but also has other features like voice recording or a text scanner. A smart pen is generally larger and has more features than an active pen. Digital pens typically contain internal electronics and have features such as touch sensitivity, input buttons, memory for storing ...