Joseph Halpern

The following patents are all owned by IBM:
Centralized synchronization of clocks, Patent Number 4,531,185, 1985 (with B. Simons and H. R. Strong).
Decentralized synchronization of clocks, Patent Number 4,584,643, 1986 (with B. Simons and H. R. Strong).
\item Fault-Tolerant Load Management, Patent Number 5,513,354, 1996 (with C. Dwork and H. R. Strong).
\item Fault-Tolerant Load Management System and Method, Patent Number 5,727,210, 1998 (with C. Dwork and H. R. Strong).
\item Method and system for protection of digital information, Patent number 5,978,482, 1999 (with C. Dwork and J. Lotspiech).
\item Method and system for protection of digital information, Patent Number 6,038,316, 2000 (with C. Dwork and J. Lotspiech).