Non-volatile memory storage of write operation identifier in data storage device
Randy H. Katz, David T. Powers, David H. Jaffe, Joseph S. Glider and Thomas E. Idleman
U.S. Patent 5,758,054. May 1998

Non-volatile memory storage of write operation identifier in data storage device
Randy H. Katz, David T. Powers, David H. Jaffe, Joseph Glider and Thomas E. Idleman
U.S. Patent 5,475,697. December 1995

Non-volatile memory storage of write operation identifier in data storage device
Randy H. Katz, David T. Powers, David H. Jaffe, Joseph S. Glider and Thomas E. Idleman
U.S. Patent 5,195,100. March 1993