Technical References

HISTAR - Miscellaneous

Miscellaneous Floating Media Hourglass Biofilter, Canada Patent No. 7989-005, September 8, 1998.

Air-Charged Backwashing Bioclarifier, U. S. Patent No. 5,770,080, June 23, 1998.

Floating Media Biofilter, U.S. Patent No. 5,445,740, August 29, 1995.

Floating Media Hourglass Biofilter, R. F. Malone, U. S. Patent No., 5,232,586, August 3, 1993.

Floating Media Biofilter, R. F. Malone, U. S. Patent No. 5,126,042, June 30, 1992.

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