Some of the same reactions as with cochlear hyperacusis can also occur, along with sudden severe vertigo or nausea. In some cases, vestibular hyperacusis can affect the autonomic system and cause problems such as loss of consciousness, mental confusion, nausea, or extreme fatigue. In both cochlear and vestibular hyperacusis, headache is common.
The Elias Howe Company was a 19th and early 20th century musical firm located in Boston, USA and founded by Elias Howe, Jr.. His company was successful, selling more than a million copies of his music instruction books by 1892. Howe was cousin to the inventor of the sewing machine and related to Julia Ward Howe, composer of The Battle Hymn of the Republic.
Ten years later, manufacturers searched for ways to mechanize sewing, and inventors turned their energies to patenting improvements to sewing machines. On May 27, 1846, Elias Howe Jr. received Patent No. 4,750 for improvements to the sewing machine, claiming to have created the first machine to sew a lockstitch using two threads. When Howe began to sue manufacturers for royalties, Huntâs previous work emerged as attorneys argued that Huntâs invention preceded Howeâs and therefore Howeâs patent claims were invalid. On April 2, 1853, Hunt submitted his application for his 1834 sewing machine, as his invention preceded Howeâs machine. The Patent Office recognized Huntâs precedence but it did not grant a patent to Hunt because he had not applied for one prior to Howeâs application. Hunt received public credit for his invention, but Howeâs patent remained valid because of a technicality. Later, Hunt was granted a patent for other improvements on the sewing machine.