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2. P-38 can opener - Wikipedia

   en.wikipedia.org/wiki/P-38_can_opener

   ] The can opener is pocket-sized, approximately 1.5 inches (38 mm) long, and consists of a short metal blade that serves as a handle, with a small, hinged metal tooth that folds out to pierce the can lid. A notch just under the hinge point keeps the opener hooked around the rim of the can as the device is "walked" around to cut the lid out.

3. Can opener - Wikipedia

   en.wikipedia.org/wiki/Can_opener

   The twist-key can-opener was patented by J. Osterhoudt in 1866. [7] There still was no general-purpose can-opener, thus each can came with a spot-welded or soldered-on twist-key can-opener which snapped off after fatiguing the metal by bending at a thin region. Each food-type had its own can-type, and came with its own can-opener-type.

4. Harbor Freight Tools - Wikipedia

   en.wikipedia.org/wiki/Harbor_Freight_Tools

   Harbor Freight Tools won a declassification of the class action; that is, the court found that all the individual situations were not similar enough to be judged as a single class, and that their claims would require an individual-by-individual inquiry, so the case could not be handled on a class basis.

5. Ermal C. Fraze - Wikipedia

   en.wikipedia.org/wiki/Ermal_C._Fraze

   Fraze decided to create an improved beverage opening method that would eliminate the need for a separate device, leading to his creation of the pull-tab opener. His first design included a lever that pierced a hole in the top of the can, but this caused a safety hazard as it produced sharp edges that could cut the user's finger.

6. William Lyman (inventor) - Wikipedia

   en.wikipedia.org/wiki/William_Lyman_(inventor)

   The top of the can was cut by pressing the cutting wheel into the can near the edge and rotating it along the can's rim. [5] The need to pierce the can first was a nuisance, and this can opener design has not survived. In 1925, a modern-style opener, equipped with an additional serrated wheel, was invented to improve Lyman's design. [3]

7. Timeline of United States inventions (before 1890) - Wikipedia

   en.wikipedia.org/wiki/Timeline_of_United_States...

   1870 Can opener (rotary, side-opening) The can opener is a device used to open metal cans. Most 21st century non-electrical can openers used a crank turning a wheel with serrated edges (to grip and turn) and is fused with a cogwheel which rotates a cogwheel fused with a cutting wheel which presses against and penetrates the can top.