Aid for teaching geography

Details Aid for teaching geography Aid for teaching geography

1989-05-26

1991-11-12

Burke, Wallace R.

Office supplies; artists and teachers materials

Teaching material

Terrestrial or extraterrestrial map or model

D 9327, D 9332

Patent

active

D03215342

REFERENCES:
patent: D45709 (1914-05-01), Greenleaf
patent: D208005 (1967-06-01), Carter
patent: D219369 (1970-12-01), Silverstein
patent: D272546 (1984-02-01), Holson
patent: 585595 (1897-06-01), Roessle
patent: 4558865 (1985-12-01), Isgar

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