Sandal sole

Details Sandal sole Sandal sole

1988-04-19

1989-05-16

Watkins, Donald

Boots, shoes, and leggings

Soles

Cushion

36 115, A43B 1320

Patent

active

048296821

ABSTRACT:
Sandal having a hollow sole containing air under slight pressure made by blow molding with a blow pipe having a pointed conical terminal providing a small entrance opening which is eventually sealed.

REFERENCES:
patent: 2507120 (1950-05-01), Shapiro
patent: 2981010 (1961-04-01), Aaskov
patent: 3160963 (1964-12-01), Aaskov
patent: 3608215 (1971-09-01), Fukuoka
patent: 4012854 (1977-03-01), Berend et al.
patent: 4106222 (1978-08-01), Houck
patent: 4217705 (1980-08-01), Donzis
patent: 4657716 (1987-04-01), Schmidt
patent: 4670995 (1987-06-01), Huang
patent: 4686781 (1987-08-01), Burg

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