Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 132,716 pages of information and 210,002 images on early companies, their products and the people who designed and built them.
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Shandong Xinhai Mining Technology amp; Equipment Inc, is a stockholding high and new technology enterprise to provide Turnkey Solution for Mineral Processing Plant including design and research, machine manufacturing, equipment procurement, management service, mine operation, mine materials procurement amp; management as well as industry resources integration.
On 30 March 1858, Hymen Lipman received the first patent for attaching an eraser to the end of a pencil. In 1862, Lipman sold his patent to Joseph Reckendorfer for $100,000, who went on to sue pencil manufacturer Faber Castell for infringement. In 1875, the Supreme Court of the US ruled against Reckendorfer declaring the patent invalid.