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Patent Known References
| Type | Patent Country | Patent Number |
|---|---|---|
| Patent | US | 4545013 |
| Patent | US | 4639861 |
| Patent | US | 4644532 |
| Patent | US | 4827411 |
| Patent | US | 4847830 |
| Patent | US | 4984264 |
| Patent | US | 5012466 |
| Patent | US | 5031093 |
| Patent | US | 5038343 |
| Patent | US | 5049873 |
| Patent | US | 5062103 |
| Patent | US | 5079767 |
| Patent | US | 5101348 |
| Patent | US | 5113499 |
| Patent | US | 5140585 |
| Patent | US | 5150356 |
| Patent | US | 5150464 |
| Patent | US | 5164938 |
| Patent | US | 5165091 |
| Patent | US | 5177736 |
| Patent | US | 5214642 |
| Patent | US | 5237569 |
| Patent | US | 5249178 |
| Patent | US | 5251204 |
| Patent | US | 5253247 |
| Patent | US | 5255264 |
| Patent | US | 5280610 |
| Patent | US | 5287355 |
| Patent | US | 5287535 |
| Patent | US | 5303078 |
| Patent | US | 5303343 |
| Patent | US | 5307465 |
| Patent | US | 5307491 |
| Patent | US | 5309434 |
| Patent | US | 5313463 |
| Patent | US | 5321813 |
| Patent | US | 5327420 |
| Patent | US | 5339318 |
| Patent | US | 5345446 |
| Patent | US | 5345558 |
| Patent | US | 5687168 |
| Patent | US | 6151324 |
| Patent | US | 6631136 |
| Patent | US | 6704320 |
| Patent | US | 7466703 |
| Patent | US | 5327486 |
| Patent | US | 5390170 |
| Patent | US | 5390173 |
| Patent | US | 5432777 |
| Patent | US | 5432790 |
| Patent | US | 5440547 |
| Patent | US | 5457681 |
| Patent | US | 5459724 |
| Patent | US | 5479401 |
| Patent | US | 5519707 |
| Patent | US | 5528759 |
| Patent | US | 5535195 |
| Patent | US | 5542047 |
| Patent | US | 5557747 |
| Patent | US | 5640504 |
| Patent | US | 5825772 |
| Patent | US | 6021132 |
| Patent | US | 6026077 |
| Patent | US | 6069895 |
| Patent | US | 6208623 |
| Patent | US | 6212185 |
| Patent | US | 6219697 |
| Patent | US | 6256295 |
| Patent | US | 6333929 |
| Patent | US | 6392990 |
