Number | Name | Date | Kind |
---|---|---|---|
973925 | Downey | Oct 1910 | |
2228892 | Zimmerman | Jan 1941 | |
2300776 | Collins | Nov 1942 | |
3357129 | Torrence | Dec 1967 | |
4057933 | Enyeart | Nov 1977 | |
4732591 | Tujisawa et al. | Mar 1988 | |
4975251 | Saceman | Apr 1990 | |
5078972 | Saceman | Jan 1992 |
Entry |
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Houseplants Indoor Air Pollutants and Allergic Reactions, B.C. Wolverton, NASA Technology Labs., MS 39529, Dec. 1986. |