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| Model Number | United States patents | Canadian patents |
| CLHM-140 CLHM-190 | 6,634,461 RE41,554 7,014,012 7,219,770 9,352,944 9,656,843 10,486,950 | 2,406,340 |
| CLHM-190W | 6,634,461 RE41,554 7,014,012 7,219,770 8,282,075 9,352,944 9,656,843 10,486,950 | 2,406,340 |
| CML-7 CML-9 | 6,634,461 RE41,554 7,014,012 7,219,770 9,352,944 9,656,843 10,486,950 | 2,406,340 |
| CML-9W | 6,634,461 RE41,554 7,014,012 7,219,770 8,282,075 9,352,944 9,656,843 10,486,950 | 2,406,340 |
| MP-800-014 MP-800-018 | 6,634,461 RE41,554 7,014,012 7,219,770 9,352,944 9,656,843 10,486,950 | 2,406,340 |
| WPLS-140 WPLS-190 | 6,634,461 RE41,554 7,014,012 7,219,770 9,352,944 9,656,843 10,486,950 | 2,406,340 |
| WPLS-190W | 6,634,461 RE41,554 7,014,012 7,219,770 8,282,075 9,352,944 9,656,843 10,486,950 | 2,406,340 |