Kohler manufactures and sells walk-in baths and other bathroom products. The company uses its own patented technology on its air-massage jets and heated surfaces. Kohler also offers a variety of ...

Kosuke Okahara for The New York Times Supported by By Clay Risen One afternoon in February 1891, a Japanese chemist named Jokichi Takamine arrived by train in Peoria, Ill. He was there at the ...