Title:
Drain guard
United States Patent 3398830
US Patent References:
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- - 0232820

/0644262.html
- - 0644262

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- - 0810879

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Inventors:
Hornquist, Holger W.
Publication Date:
08/27/1968
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Primary Class:
210/153
Other Classes:
210/459, 210/407, 210/451, 210/446
International Classes:
E03F5/14; E04D13/08; E04D13/04
US Patent References:
1230024
1504233Drain protector
2449731Growth poisoning sewer joint
2669358Strainer for downspout drains
2787499Sprinkler