1
Kruszynski Tadeusz, Van Der Floe Hans, Eggiman Fritz, Wildhaber Ekkehard A: System for the parallel transmission of signals. Autophon Aktiengesellschaft, November 23, 1971: US3622885 (100 worldwide citation)

A system for transmission of continuous signals wherein the signals are sampled into sections, which sections are subsequently assembled into groups. A frequency band is permanently associated with each section dependent upon its position within the group and for each section an alternating-current ...


2
Van Der Floe Hans: Installation for the recording of oral messages directed to different addressees, and for the reproduction of these messages during the recall of an addressee.. Autophon, March 3, 1982: EP0046623-A2 (36 worldwide citation)

1. Installation connected to a telephone exchange (1) and having first circuit means (9) for storing oral messages transmitted over the telephone, each directed to different specific addresses (2), and for reproduction thereof upon polling over the telephone by an addressee (2), further having secon ...


3
Van der Floe Hans, Kully Herbert, Stverak Vacalv, Affolter Stephan: Apparatus for searching for people who are buried or trapped and equipped with the same type of apparatus. Autophan Aktiengesellschaft, December 4, 1973: US3777267 (7 worldwide citation)

Apparatus for searching and determining the location of a transmitter carried on a person buried or trapped by a landslide, cave-in, and the like wherein the apparatus consists of a single unit having a selectively operative transmitter stage portion and a selectively operable receiver stage portion ...


4
van der Floe Hans O, Friedli Johann Christian: Electrical circuit for generating precise high frequency oscillation intermittently modulatable in frequency. Autophon Aktiengesellschaft, May 29, 1973: US3736529 (1 worldwide citation)

An electrical circuit arrangement for generating a high frequency oscillation of high frequency precision intermittently modulatable in its frequency so that a frequency modulated signal can be periodically delivered. A high frequency semi-conductor oscillator receives two voltage inputs for control ...