Code of Federal Regulations · Section
§ 3863.1-2 — -2 Proof Of Improvements For Patent
43 C.F.R. § 3863.1-2
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The proof of improvements must show their value to be not less than $500 and that they were made by the applicant for patent or his grantors. This proof should consist of the statement of two or more disinterested witnesses.
Authorizing Statute
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Lands open to purchase by citizens30 U.S.C. § 22
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Fees and charges for Government services and things of value31 U.S.C. § 9701
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Congressional declaration of policy43 U.S.C. § 1701