ROHO Celebrates Golden Anniversary Happy 50th birthday to ROHO, whose “dry floatation” technology was created by Robert H. Graebe in 1973. The milestone was celebrated at the ROHO facility in Belleville, Ill., on Sept. 23. According to Permobil, who acquired ROHO in 2015, the event included factory tours, music, children’s activities, food, and prize giveaways.…