Y- GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS AND DIGESTS.

C22B3/00- Extraction of metal compounds from ores or concentrates by wet processes.

C22B- PRODUCTION AND REFINING OF METALS PRETREATMENT OF RAW MATERIALS.

C22- METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FERROUS METALS.

suction dredgers wherein at least a part of the soil-shifting equipment is handheld

E02F3/8891- Dredgers Soil-shifting machines mechanically-driven with arrangements acting by a sucking or forcing effect, e.g.

E02F3/88- Dredgers Soil-shifting machines mechanically-driven with arrangements acting by a sucking or forcing effect, e.g.

E02F3/04- Dredgers Soil-shifting machines mechanically-driven.

E02F3/00- Dredgers Soil-shifting machines.

E02- HYDRAULIC ENGINEERING FOUNDATIONS SOIL SHIFTING.

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Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Fee Related Application number US09/240,045 Inventor Thomas A. Google Patents Portable gold mining dredgeĭownload PDF Info Publication number US6079130A US6079130A US09/240,045 US24004599A US6079130A US 6079130 A US6079130 A US 6079130A US 24004599 A US24004599 A US 24004599A US 6079130 A US6079130 A US 6079130A Authority US United States Prior art keywords drum receptacle attached pump dredge Prior art date Legal status (The legal status is an assumption and is not a legal conclusion. Google Patents US6079130A - Portable gold mining dredge

Portable mining dredge