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1answer
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Can someone patent an invention post-hoc

If an invention has already reached market, can the technology be patented by the inventor(s)? Is there a threshold of time post-hoc or just not possible?
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1answer
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If someone else invents and patents a design 5 years after you've been selling the same design

can they make you stop selling your own invention? Can they make you pay them licensing fees for something you designed way before they did? I designed a unique baby outfit in 2008 and started selling ...
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1answer
1k views

How many priority numbers can a patent have?

When I search patents at espacenet.com I see that some patent documents have multiple priority numbers. For example WO2010054132 has 4 priority numbers. (see bibliographic data). What does this mean? ...
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3answers
571 views

Should I file a provisional application?

In the past I've been discouraged from filing provisional applications (in the US), but the new "first to file" provisions of the "America Invents Act" would seem to make a provisional application a ...