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    • 5. 发明授权
    • Digital watermarking systems and methods
    • US10217181B2
    • 2019-02-26
    • US12608725
    • 2009-10-29
    • John F. Butler
    • John F. Butler
    • H04L9/00H04L9/32G06T1/00H04N19/467H04N21/8358H04N1/32G06F21/10
    • Systems and methods for protecting digital content using digital watermarks and for distributing that protected digital content are described. The digital watermark contains watermark information, fingerprint information, and any other information desired by the provider of the digital content. To insert the digital watermark in the digital content, a section of the digital content is selected, whether it is a random section or a desired section (such as the first or last section), and then that section is broken into a given number of individual slides. The digital watermark is created as an additional slide or frame and then placed between the slides of that section. These individual slides, which now contain the watermark, are re-combined and then re-attached to the remainder of the digital content when desired, such as on the fly or at the time of the user's purchase of the digital content. The user (or other viewer) receives only a single packet of information for the digital content, rather than numerous packets of information, preventing compression and decompression processes from avoiding the watermark since any such compression would not only diminish the slide with the watermark on it, but also the content and render the digital content unusable. Other embodiments are described.
    • 10. 发明授权
    • Method of producing a high strength steel having uniform elongation
    • 制造具有均匀伸长率的高强度钢的方法
    • US4033789A
    • 1977-07-05
    • US668374
    • 1976-03-19
    • Emil G. HamburgRobert L. CrydermanJohn F. Butler
    • Emil G. HamburgRobert L. CrydermanJohn F. Butler
    • C22C38/00C21D6/00C21D8/02C21D7/14
    • C21D8/0226C21D2211/002C21D2211/005C21D2211/008C21D8/0263
    • A steel product having a combination of high strength and formability (as measured by percent tensile uniform elongation) is produced by austenitizing a steel consisting essentially of from 0.04 to 0.17% carbon, 0.8 to 2.0% manganese, up to 1.0% silicon, up to 0.12% vanadium, up to 0.1% columbium, up to an effective amount of titanium to form titanium carbonitrides, 0.001 to 0.025% nitrogen, balance essentially iron and then cooling at a rate of no more than about 70.degree. F/sec. to about 850.degree. F and at a rate of more than about 10.degree. F/sec. to transform the freshly formed austenite to a microstructure of from 10 to 35% by volume of martensite and/or lower bainite (MLB), balance essentially proeutectoid ferrite. Slower cooling rates may be employed to obtain the desired microstructure if a restricted chemical composition is used. The heat-treated steel product is characterized by an ultimate tensile strength of 80,000 p.s.i. minimum and a uniform elongation of 16% minimum.
    • 具有高强度和成形性的组合(通过拉伸均匀伸长率测定)的钢产品通过将基本上由0.04至0.17%的碳,0.8至2.0%的锰,至多1.0%的硅组成的钢进行奥氏体化,直至 0.12%的钒,至多0.1%的铌,至有效量的钛,形成钛碳氮化物,0.001至0.025%的氮,余量基本上为铁,然后以不超过约70°F /秒的速率冷却。 至约850°F和大于约10°F /秒的速率。 将新形成的奥氏体转变成10〜35体积%的马氏体和/或下贝氏体(MLB)的微观结构,平衡本质上为先共析铁素体。 如果使用有限的化学组成,可以采用较慢的冷却速率来获得所需的微结构。 热处理钢产品的特点是极限拉伸强度为80,000 p.s.i。 最小和均匀伸长率最小为16%。