MADDEN, Judge.
Plaintiff claims that the defendant infringed patents owned by plaintiff, when in 1933 the defendant contracted with Air Cruisers, Inc., for the manufacture and delivery of 2,000 gas pressure cartridges to be used for inflating vests to be worn by aviators as life preservers, and later accepted delivery of and paid for the cartridges.
The patents claimed to be infringed are the Mapes patent, granted to Daniel Mapes July 18, 1933, and the Heigis...
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