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Unlike intellectual property patents, which have time limits, a land patent is permanent. A land patent, known in law as "letters patent," typically issues to the original grantee and their heirs and assigns in perpetuity. The patent serves as the supreme title to the land, as it confirms that all evidence of title existing before its issuance ...
Relation between patent law and antitrust law. Kewanee Oil v. Bicron: 416 U.S. 470: 1974: State trade secret law not preempted by patent law. Dann v. Johnston: 425 U.S. 219: 1976: Patentability of a claim for a business method patent (but the decision turns on obviousness rather than patent-eligibility). Sakraida v. Ag Pro: 425 U.S. 273: 1976
Legal estoppel is a principle of law, particularly United States patent law, that an assignor or grantor is not permitted subsequently to deny the validity of title to the subject matter of the assignment or grant.
Synthesizing the law of colonizing powers, Marshall traces the outlines of the "discovery doctrine"—namely, that a European power gains radical title (also known as sovereignty) to the land it discovers. As a corollary, the "discovering" power gains the exclusive right to extinguish the "right of occupancy" of the Indigenous occupants, which ...
Property law in the United States is the area of law that governs the various forms of ownership in real property (land and buildings) and personal property, including intangible property such as intellectual property. Property refers to legally protected claims to resources, such as land and personal property. [1]
An extension of the homestead principle in law, the Homestead Acts were an expression of the Free Soil policy of Northerners who wanted individual farmers to own and operate their own farms, as opposed to Southern slave owners who wanted to buy up large tracts of land and use slave labor, thereby shutting out free white farmers.
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