And a kittenâs teeth first come in between two to four weeks; their more permanent set appears at around four months of age. So if you open a catâs mouth and find permanent, white teeth, the feline is likely to be around a year old. popular misconception is that cats age seven years (in human years) for each calendar year. In fact, feline aging is much more rapid during the first two years of life.
Sarah Boone (1832-1904) was an African American inventor who on April 26, 1892, obtained United States patent rights for her improvements to the ironing board.
Nevertheless, this invention of the ironing board was patented, and Boone was said to be among the first African Americans who garnered a patent for a particular useful invention. Its patent (U.S. Patent #473,653) was done in the 26th of April in 1892.