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David Sarnoff, American radio pioneer ; 1921

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Inventor: Norishige Hirakawa

Address: Saitama, JP
No. of patents: 1
Last patent issue date: 08/04/1987

Number	Title	Issue Date
4684333	Self-priming pump A communication hole is bored through a partition member which divides an intake-side priming fluid chamber from a discharge-side priming fluid chamber, whereby the two chambers are connected. The communication hole serves to prevent, on a predetermined l...	08/04/1987