Master industries, incorporated Operating in the red since Ap 1971. RMN Jy 10, 1973 p.5,10 Files for bankruptcy. RMN Ag 24, 1973 p.5,26. Bankruptcy creditors meet set for September 17. Post Ag 24, 1973 p.3 John R. Sauer, founder of defunc Master Industries Incorporated pleaded guilty to t:ao misdemeanor counts, probation hearing set. RMN 11, 1973 p.10 John Sauer agrees to pay back $100,000 to 37 former employees of his firm Master Industries. RMN 28, 1975 p.5