Frequency induction locator to find gold and silver

Details Frequency induction locator to find gold and silver Frequency induction locator to find gold and silver

1987-06-18

1990-03-20

Holtje, Nelson C.

Measuring, testing, or signalling instruments

Measuring, regulating or indicating instrument, or casing

Food preparation type

Patent

active

D03067033

REFERENCES:
patent: D225005 (1972-10-01), Greene
patent: D245233 (1977-09-01), Wolfe
patent: D248627 (1978-07-01), Tyndall
patent: D249777 (1978-10-01), Roettele et al.
patent: D251364 (1979-03-01), Henault et al.
patent: D255336 (1980-06-01), Roettele et al.
patent: D274607 (1984-07-01), Schaefer et al.
patent: D290586 (1987-06-01), Moore
patent: 3662255 (1972-05-01), Garrett
patent: 3988663 (1976-10-01), Slough et al.

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