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Rotary Reciprocating Engine

Description: Patent for this invention has relation to the type of engines combining rotary and reciprocating movements in one structure, the purpose being to combine the working elements in such relation as to convert maximum percentage of force into available form for the performance of work.
Date: January 22, 1901
Creator: Williams, Win D.
Item Type: Refine your search to only Patent

Pipe and Like Stem.

Description: Patent for improved smoking equipment stems which prevents saliva from running down the stem. The end of the stem has a new design which extends upwards and then wraps forward and downward, leaving a slot where no saliva can enter.
Date: February 22, 1921
Creator: Crossman, Alvin Amos
Item Type: Refine your search to only Patent
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