my crossword

1. inventions included an evaporative air conditioner, an improved process for manufacturing carbon filaments for light bulbs, and an improved toilet system for railroad cars.
4. inventor who held more than 50 patents in the U.S. He was the first African American mechanical and electrical engineer after the Civil War. Self-taught, he concentrated most of his work on trains and streetcars.
6. a new device and technique for cataract surgery known as laserphaco. Dr. Bath was the first woman to chair an ophthalmology residency program in the United States.
7. a breathing device in the form of a canvas hood—a precursor to the modern gas mask.

2. a folding cabinet bed to fit in small homes.
3. American inventor best known for her patented improvements to the ironing board.
4. his most significant inventions were a street letter box (U.S. Patent numbers 462,092 and 462,093) and a mechanical device for operating street railway switches (U.S. Patent number 430,118).
5. and patented an automatic oiling device for the moving parts of steam locomotives, colloquially known as the “oil-drip cup.”
6. of the potato chip, was born on July 15, 1824 in Saratoga Country, New York to parents Abraham Speck, an African American, and Diana Tull, a Native American of the Huron Tribe.