BRITISH PATENT
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GB 11.464 William Thomas
of Cheapside, in the city of London, merchant
Improvements in Machinery for sewing or stitching various fabrics
A communication; 6 months; colonies.
December 1, 1846
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...After patenting his invention, Howe spent three discouraging years in both the United States and in England trying to interest manufacturers in building his sewing machine, under license. Finally, for £250 sterling, he sold the British patent rights to William Thomas and further agreed to adapt the machine to Thomas’ manufacture of umbrellas and corsets...
May 9, 1855 THOMAS' DISCLAIMER
Fisher & Gibbons invented a sewing machine without knowing it
it was sufficient to invalidate Howe's (or Thomas's) patent, parts of which were accordingly disclaimed.
1858 THOMAS' SECOND DISCLAIMER AND MEMORANDUM OF ALTERATION