1
Nils A T Andersson, Nils U H Fagerstedt, Bjorn G Gudmundsson: Modular packaging system. Telefonaktiebolaget LM Ericsson, Burns Doane Swecker & Mathis, March 14, 1995: US05398159 (45 worldwide citation)

In a modular packaging system for electrical equipment, two or more modules are arranged horizontally or vertically relative to one another. Each module includes electrical equipment, a cabinet in which the electrical equipment is disposed, and a fan assembly for forcing air through the cabinet to c ...


2
Nils U H Fagerstedt, Sture G Roos, Franko Stipcevic: Method and apparatus for through-connection testing in a digital telecommunication network. Telefonaktiebolaget LM Ericsson, Roberts Spiecens Cohen, March 11, 1986: US04575841 (14 worldwide citation)

The invention relates to a method and apparatus in duplex transmission of digital information between subscribers connected to terminals associated with each other in a telecommunication network of the time multiplex type in which information is transmitted in the form of binary words in specially a ...


3
Sture G Roos, Nils U H Fagerstedt, Jens E Pehrson: Digital concentrator. Telefonaktiebolaget LM Ericsson, Roberts Spiecens & Cohen, December 17, 1985: US04559624 (3 worldwide citation)

A digital concentrator includes line circuit modules (3,4) and provides time-division multiplex (TMD) channel set-ups between a bus (5), connected to all modules, and PCM links (1), each going from its own module, the number of links being less than the number of modules, as well as between groups o ...