US GB CA JP DE FR NL EP IT WO BE CH 5,032,877 1 2 4,969,018 1 2 4,912,531 1 2 4,620,206 1 2 4,599,728 1 4,589,115 1 4,581,621 2 2 4,575,924 1 2 4,532,535 1 1 1 1 4,503,447 1 1 4,439,782 1 4,393,481 3 4 3 2 2 2 4 4,389,612 1 1 1 1 1 1 4,353,081 1 2 4,313,178 1 4,291,390 1 4,263,664 3 4 3 2 2 2 4 4,051,393 1 3,936,677 1 3,862,436 1 3,833,894 1 3,636,371 1 1 1 1 3,533,008 1 3,254,276 1 1 1 1 1 3,197,839 3 1 1 2 3,065,432 1 JPS 5990978A 1 JPS 5967676A 1 GB 2107927A 1 1 2 GB 1084565A 1 1 1 1 EP 0034166A1 3 1 1 1 2 1

Legend # Active # Expired # No Legal Data/Unknown # Multiple Status Number of References

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