Robert M Shapiro, Jawahar Malhotra, Kurt Jensen, Soren Christensen, Peter Huber: Computer-aided generation of programs modelling complex systems using colored petri nets. Meta Software Corporation, Wolf Greenfield & Sacks, October 26, 1993: US05257363 (52 worldwide citation)

A method and system in which a programmed digital computer serving as a graphical "engine" is employed to construct an executable model for a complex system using a hierarchy of so called "Colored" Petri nets (CPN's or CP-nets). The operation of the complex system is specified in terms of a graphica ...

Ronald A Anderson, Robert M Shapiro: Fiber optic cable and core. Schlumberger Technology Corporation, March 1, 1983: US04375313 (37 worldwide citation)

A cable adapted for well logging has an optical fiber core in which the optical fibers are protected from moisture and non-uniform stresses by first wrapping the fibers in a helical spiral around a solid, soft, deformable core material and then blanketing them with more of the same. Next the blanket ...