|
| US4175923 | 26. Juni 1978 | 27. Nov. 1979 | | Method and apparatus for occult blood testing in the home |
| US4260393 | 15. Jan. 1979 | 7. Apr. 1981 | Technology Resources, Inc. | Method and combined test elements for detection of heme |
| US4526869 | 31. März 1983 | 2. Juli 1985 | Regents of the University of Minnesota | Method for quantitatively determining the concentration of hemoglobin in a biological sample |
| US4541987 | 29. Sept. 1983 | 17. Sept. 1985 | Helena Laboratories Corporation | Test pad for detecting occult blood |
| US4582685 | 16. Jan. 1985 | 15. Apr. 1986 | Helena Laboratories Corporation | Test kit for performing a medical test |
| US4647541 | 16. Jan. 1985 | 3. März 1987 | Helena Laboratories Corporation | Method for performing an occult blood test |
| US4675160 | 28. Jan. 1986 | 23. Juni 1987 | Warner-Lambert Company | Occult blood test monitor |
| US4676950 | 3. Febr. 1984 | 30. Juni 1987 | Foster Research Corporation | Indicator and test device for detecting occult blood |
| US4725553 | 8. Juli 1985 | 16. Febr. 1988 | Helena Laboratories Corporation | Test composition for detecting occult blood |
| US4956300 | 16. Okt. 1984 | 11. Sept. 1990 | Helena Laboratories Corporation | Aid for determining the presence of occult blood, method of making the aid, and method of using the aid |
| US5081040 | 6. Juni 1989 | 14. Jan. 1992 | Helena Laboratories Corporation | Composition and kit for testing for occult blood in human and animal excretions, fluids, or tissue matrixes |
| US5196167 | 9. Mai 1991 | 23. März 1993 | Helena Laboratories Corporation | Fecal occult blood test product with positive and negative controls |
| US5217874 | 9. Mai 1991 | 8. Juni 1993 | Helena Laboratories Corporation | Fecal occult blood test product with positive and negative controls |
| US5273888 | 29. Apr. 1988 | 28. Dez. 1993 | Helena Laboratories Corporation | Chemical test kit and method for determining the presence of blood in a specimen and for verifying the effectiveness of the chemicals |
| US5468450 | 16. Dez. 1993 | 21. Nov. 1995 | | Expanding vehicle for colorimetric diagnostic assays |
| US5702913 | 12. Juni 1989 | 30. Dez. 1997 | Helena Laboratories Corporation | Chromgen-reagent test system |
| US6850633 | 23. Febr. 2001 | 1. Febr. 2005 | Beckman Coulter, Inc. | Devices and methods for reading and interpreting guaiac-based occult blood tests |