Retractable roller directory

Details Retractable roller directory Retractable roller directory

1988-03-23

1991-06-18

Burke, Wallace R.

Sales and advertising equipment

Signs or display forms

Attachable to vertical surface or hanging type

D20 10, D20 21

Patent

active

D03176304

REFERENCES:
patent: 433841 (1890-08-01), Williamson
patent: 679462 (1901-07-01), Burkhart
patent: 1583998 (1926-05-01), Rickey
patent: 1688677 (1928-10-01), Winter
patent: 1728649 (1929-09-01), Winter
patent: 2461103 (1949-02-01), Amis
patent: 2828562 (1958-04-01), Warren
patent: 3255808 (1966-06-01), Schimizzi
patent: 3466776 (1969-09-01), Paige
patent: 4525946 (1985-07-01), Olson

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