Do I need a working prototype for a patent? 2 Answers as of September 10, 2010

Do I have to have a working prototype in order to apply for a patent?

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Kafantaris Law Group
Kafantaris Law Group | Theo Kafantaris
A prototype is not required to file for a patent, but I recommend them before filing. Creating a prototype helps solidify the essence of the invention, and helps with the marketing of the invention as well.
Answer Applies to: California
Replied: 9/10/2010
Nelson & Lawless
Nelson & Lawless | Terry Nelson
I do not believe so, but any inventor serious about obtaining and protecting patents should consult with an experienced patent attorney for help. It is no longer a system you can handle without experience.
Answer Applies to: California
Replied: 9/8/2010
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