E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
E21B 33/03 (2006.01)
Patent
CA 2471028
A safety cover for an artesian well which is provided as an inexpensive means of eliminating insects from entering into the artesian well for contaminating potable water therein.
Roy Diane
Roy Lise
Fonderie Pelletier Inc.
Na
Roy Diane
Roy Lise
LandOfFree
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