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.
Facts And Figures. 1  The first electric steam iron was patented in the U.S. by Swiss inventor Otto Walker in December 1924. 2  Modern ironing boards and pads are designed to work with your iron, enhancing its performance. 3  A wall-mounted ironing-board hanger and steam-iron rest lets you put your iron away while still hot. As you iron, heat is absorbed by the material you're ironing, as well as the ironing board itself. Steam irons are available with up to 2,300 watts of power, but some would argue that 1,500 watts is all you need.