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.
Were it not for Peters, the board wouldnât have either its name or its patent. âFor 20 years I researched the fathers of the Ouija board,â Murch said. âTurns out, it had a mother.â. Elijah Bond's patent for the Ouija Board (via US Patents). For more on the Ouija Board, visit the Maryland grave of its patent holder Elija Bond.