Maillefer Instruments Holding Sarl

Ecole Polytechnique Federale De Lausanne

Institut De Microtechnique Université De Neuchâtel

Université De Neuchâtel

Cyril Botteron

Roman Merz

Pierre-André Farine

Francois Aeby

Pierre-Andre Farine

François Aeby

An identification method for a data Sk is disclosed which includes;

Method for identifying data encoded by PPM modulation, and receiver for said method

An apex-locating method and device for determining the depth position of the apex in a dental root canal. It uses a device making it possible to form a circuit including a first probe electrode inserted into the root canal of a tooth, a second electrode in conductive contact with an oral mucous membrane, frequency-generating elements able to produce alternating electrical signals at a number of frequencies, and elements for measuring electrical magnitude of alternating signals in the circuit. Provision is made for exciting the circuit and measuring the levels of magnitude of the alternating signals, respectively at low frequency and at high frequency and for detecting a point of intersection where the two levels measured at low and high frequencies meet and become substantially equal, these frequencies being sufficiently far apart for this point of intersection to exist. This point gives the position of the apex.

Method and device for determining the apical position in a dental root canal

This invention concerns a wireless data communication method, wherein a transmitter device having a first wide band antenna transmits ultra-wide band coded data signals to a receiver device having a second wide band antenna for receiving the direct and/or multiple path coded data signals. The transmitted data is defined by one or several sequences of N pulses where N is an integer number greater than 1. The arrangement of the N pulses of each sequence represents a data coding relative to the transmitter device. The N pulses of a sequence of direct and/or multiple path coded data signals received by the receiver device are processed each in one among N corresponding reception time windows. Each of the N reception time windows is positioned in time based on a known theoretic arrangement of the N pulses of signals transmitted by the transmitter device. An adding operation of the N windows is then performed in the receiver device so that the amplitude level of the constantly added pulses is higher than the amplitude level of the noise sensed by the receiver device.

Wireless data communication method via ultra-wide band encoded data signals, and receiver device for implementing the same

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Gals, Switzerland

Cyril Botteron