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Mary's Inventors Blog

By Mary Bellis, About.com Guide to Inventors since 1997

I Can't Hear You

Saturday August 2, 2008
ear plugs - patent drawingThat's because I'm wearing ear plugs. However, if you can hear me I'm inviting you to view several early and unusual patents for different ear plug styles in our Gallery of Famous Ear Plugs or to read my History of Ear Plugs.

Reader Mail

  • Nina wrote to me inquiring about wrenches. The wrench drawings are for illustrative purposes only and are not historic examples. There are many different types of and thousands of patents issued for wrenches. Johan Petter Johansson (1853-1943) was one of Sweden's foremost inventors with 100 patents including a monkey wrench (1892) and a pipe wrench (1888).
  • Jill, sorry to hear about your troubles try reading Lessons on Turning a New Invention Idea Into Money for starters and please post to our forum - we have readers who care and can help.

Comments

June 25, 2006 at 2:28 pm
(1) weatherspoon says:

magnificent!!! www.nvillinois.com

August 5, 2008 at 12:31 pm
(2) paata says:

mr/mrs. i m 19 years old student and i whant to know if i invent the drug for diabetes such a insulin is and atc, with whom can i descase about? i m from georgia and i have a talant to see in the flouer some colours which i called energies. but my basic problem is, that i cant speak english quite fluently. if you will be intrested impormation which i gave you, i will be able to pass you addition impormation which i have on my peapers. thanks for everything.
yours faithfully paata kvlividze

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