• Basic animal research completed:

• 1971: New PST® device with 5th generation electronics.

• 1973: First PST® clinical study - in an orthopaedic doctors office.

• 1976: Completion of first clinical trials of PST®.

• In vitro studies in Germany.

• First process patent issued 5,131,904 (+52 subsequent patents)

• Discussions with leaders in the field of arthrosis.

• Discussions with physicists and engineers to develop the constellation of energy parameters required for the PST® signal.

• Initial discussion with universities to develop a clinical study and treatment protocol.

• Finalizing the clinical study program and initiation at Yale University School of medicine teaching hospitals.

• Presentation of PST® at university medical conferences.

• Clinical studies in Waterbury, Danbury; CT and Melville NY (under Yale university IRB approved protocol)

• Publication of various clinical studies in peer reviewed medical journals.

• Completion of a large number of in vitro studies (Cornell University; University of Siena, Charitee, Berlin)

• Presenting PST® at 60 scientific conferences and meetings.

• Completion of more than 25 clinical studies.

• Opening the first clinics in Germany in June 1996.

• Developing new applications for the PST® technology.

• Development of the full body device with a full body coil system and 273 degree effective angulation.

• 2002: Clinical study at Hôpital Cochin (France).

• Increasing geographical scale: Brazil (2002), Portugal (2002), Italy (2004)

• 2003: Launch of the PST® Mobile device

• 2004: Evolution of the full bed device equiped with a double-coil system

• 2005: Creation of Groupe President Medical

• 2007: GPM acquires PST® patented technology.

• Clinical study at Tor Vergata hospital (Italy).