
The top ten most popular inventors as determined by your reader usage and research demands.
And please don't vote for yourself. That is unless you are an inventor. Photo: Getty Images
Famous events on the March Calendar for patents, trademarks, or copyrights and who has the same March birthday as you?

With both beauty and brains, women inventors are making major contributions in every area of science today. And don't be surprised if the next must have gadget you buy was invented by a mother of invention.

The top ten most popular inventors as determined by your reader usage and research demands.
And please don't vote for yourself. That is unless you are an inventor. Photo: Getty Images
In 1899, after Wilbur Wright had written a letter of request to the Smithsonian Institution for information about flight experiments, the Wright Brothers designed their first aircraft: a small, biplane glider flown as a kite to test their solution for controlling the craft by wing warping. That was the beginning, the Wright Brothers went on to invent the first true airplane.
Brainstorming is a process of spontaneous thinking used by an individual or by a group of people to generate numerous alternative ideas while deferring judgment. Brainstorming is the crux of each of the stages of all problem-solving methods; and good brainstorming is great skill for inventors to have. Next time you get inventors' block try brainstorming your way clear.
Philip wants to reproduce and sell copies of two airline posters he has collected, one is dated 1951 and includes copyright notification, and the other is dated 1940. Philip asks if he can legally do so and if the copyrights have been renewed, and how he would know.
Philip, I have this handy article, "When Copyright Protection Becomes Public Domain." You may also want to read, "Can I Search The Copyright Office?" to learn how to check on a work.
You have entered that grey area of works dated between 1923 and 1964. When the answer is no or maybe, and the burden of proof is on you, and don't risk it for commercial ventures. In your case there is a company name on the posters, and you might have to contact them under copyright law to find out what the status of the rights are, that's called diligent search. So for you the answer is no, not without checking and/or asking permission.
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