1
Polyzoides John: Knee prosthesis.. Polyzoides John, Tsakonas Athanassis, January 3, 1990: EP0349173-A1 (128 worldwide citation)

Knee joint prosthesis comprising a metal or other femoral component (10) providing substitute condylar bearing surfaces (20); a metal or other tibial component (12) whose major portion (24) provides a platform; and a single plastics or other meniscal element (14) seating on said platform and engaged ...


2
Polyzoides John, Tsakonas Athanassis: Knee prosthesis. Polyzoides John, Tsakonas Athanassis, December 28, 1989: GB2219942-A (16 worldwide citation)

Knee joint prosthesis comprising a metal or other femoral component (10) providing substitute condylar bearing surfaces (20); a metal or other tibial component (12) whose major portion (24) provides a platform; and a single plastics or other meniscal element (14) seating on said platform and engaged ...


3
Tsakonas Athanassis: Partial or total movement of the subjects of advertising boards, panels and tent-boards. Tsakonas Athanassis, August 16, 2000: EP1027695-A1

A method which gives us the ability to move the pictures of advertising boards (1) as well as of tents (8, 8a) with the help of rollers (2, 2a, 2b). Also, external subjects with independent movement or immovable ones can be added, offering a complete synthesis of the picture (3, 3a).