Joseph A. Bigler

Mine Safety Appliances Co. LLC develops, manufactures and supplies safety products. The firm's products include self-contained breathing apparatus, gas masks, gas detection instruments, head protection, respirators, thermal imaging cameras and fall protection. Its solutions integrate multiple combinations of electronics, mechanical systems and advanced materials to ensure that users around the world remain protected in even the most hazardous of situations. The company was founded by John T. Ryan Sr. and George H. Deike Sr. on June 14, 1914 and is headquartered in Pittsburgh, PA.