Pet litter tray

Details Pet litter tray Pet litter tray

1980-09-15

1984-01-10

Spangler, Robert C.

Animal husbandry

Feeder or waterer

Bird feeder

D3099

Patent

active

D02721988

REFERENCES:
patent: D229009 (1973-11-01), Dolby et al.
patent: D229486 (1973-12-01), Roper
patent: D229708 (1973-12-01), Dugan-Chapman
patent: D246751 (1977-12-01), Yonkers
patent: D258711 (1981-03-01), Baker et al.
patent: D260568 (1981-09-01), Cherry
patent: 3640209 (1972-02-01), Wilson
patent: 3793988 (1974-02-01), Traeger
patent: 3827401 (1974-08-01), Franzl
patent: 3877603 (1975-04-01), Holz
patent: 4279217 (1981-07-01), Behringer
patent: 4325822 (1982-04-01), Miller

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