Anti-vortex safety cover for a drain

Details Anti-vortex safety cover for a drain Anti-vortex safety cover for a drain

1990-11-21

1993-02-16

Largen, James R.

Environmental heating and cooling; fluid handling and sanitary e

Fluid handling or treatment equipment

Fitting

4286, 4507, 45411

Patent

active

D03333426

REFERENCES:
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patent: 3667611 (1972-06-01), Pansini
patent: 3940807 (1976-03-01), Baker et al.
patent: 4115878 (1978-09-01), Johnson et al.
patent: 4170047 (1979-10-01), Corsette et al.
patent: 4359790 (1982-11-01), Chalberg
patent: 4658449 (1987-04-01), Martin

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