57
Manufactured under one or more of the following patents:
• USA: 4,587,984; 4,763,769; 4,838,406; 5,167,314; 5,184,708; 5,460,256; 5,485,908; 5,577,957; 5,579,887;
5,607,350; 5,662,205; 5,673,781; 5,733,186; 6,230,870;
• France: 9302237
• Canada: CA1,223,364 and CA1,281,134
• Germany: DE3410924
• Great Britain: GB2140954
• Italy: IT1263618