A selected summary of Southern California-related business litigation developments during the past week.

Four Plead Guilty in Defense Fraud Case: Four men who worked on the B-1 bomber pleaded guilty to federal tax crimes stemming from income they received from their employer, a fraudulent defense contractor in Montebello who was convicted in two separate cases in 1989 and 1990. The contractor, Joseph Kasparoff, owner of Super K, paid the four men without withholding deductions for income taxes. The four men face sentences of up to a year in prison and a $25,000 fine each. They were Robert Hiram Hunter, 53, of Whittier; Benjamin Jasbon, 41; Santana Holcomb, 56, and Glen Hundrup, 65. (Case No. 91-15. Filed Jan. 22)