Hand operated air pump for use in composting operations

Details Hand operated air pump for use in composting operations Hand operated air pump for use in composting operations

1993-09-23

1994-11-01

Burke, Wallace R.

Environmental heating and cooling; fluid handling and sanitary e

Fluid handling or treatment equipment

Hand or foot operated pump or well curb

Patent

active

D03520935

REFERENCES:
patent: D322471 (1991-12-01), Myers
patent: 669118 (1901-03-01), Kindermann
patent: 817538 (1906-04-01), Wixon
patent: 1330266 (1920-02-01), Holstein
patent: 3904326 (1975-09-01), Clement
patent: 4569275 (1986-02-01), Brunet
patent: 4712592 (1987-12-01), Brown
patent: 4932849 (1990-06-01), Scheffer

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