US Patent No. 8,944,111 B2 (111 B2) identifies the Perfect Pitch® system as both an apparatus and method of installation used to ensure that a proper pitch is employed in condensate and waste piping installations for the transport of liquid to a...
via Technology - United States - Latest News http://ift.tt/1FFMirv
via Technology - United States - Latest News http://ift.tt/1FFMirv
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