Comparison With Patents
To acquire a patent, full information about the method or product has to be supplied to the patent office and upon publication or issuance, will then be available to all. After expiration of the patent, competitors can copy the method or product legally. The temporary monopoly on the subject matter of the patent is regarded as a quid pro quo for thus disclosing the information to the public.
One popular misconception held by many is that trade secret protection is incompatible with patent protection. It is typically said that if you apply for a patent you can no longer maintain a trade secret on the invention, but this is an oversimplification. It is true that in order to obtain a patent you must disclose your invention so that others will be able to both make and use the invention, and, to obtain a patent in the United States, if you have any preferences you must likewise disclose your preferences. What is typically not appreciated though is that the critical time for satisfying this disclosure requirement is at the time the application is filed. In many if not most situations, improvements will be made to an invention even after filing of the patent application, and additional information will be learned. None of this additional information must be disclosed and can instead be kept as a secret. Virtually all patent licenses include clauses that require the inventor to disclose any trade secrets they have. Frequently it is this information not disclosed in the patent that is the most commercially viable. Thus, if you are attempting to sell or license your patent rights you want to make sure that you take steps to continue to maintain your trade secrets as secrets, otherwise they will be lost. Accordingly, before disclosing any secrets not already protected by an issued patent you should use a non-disclosure agreement.
Compared to patents, the advantages of trade secrets are that a trade secret is not limited in time (it "continues indefinitely as long as the secret is not revealed to the public", whereas a patent is only in force for a specified time, after which others may freely copy the invention), a trade secret does not imply any registration costs, has an immediate effect, does not require compliance with any formalities, and does not imply any disclosure of the invention to the public. The disadvantages of trade secrets include that "others may be able to legally discover the secret and be thereafter entitled to use it", "others may obtain patent protection for legally discovered secrets", and a trade secret is more difficult to enforce than a patent.
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