Inflatable skating rink

Details Inflatable skating rink Inflatable skating rink

1996-04-08

1999-08-24

Clark, Doris

Building units and construction elements

Structure

Arena or stadium

2503

Patent

active

D04131690

REFERENCES:
patent: 2168913 (1939-08-01), Middleton
patent: 2221366 (1940-11-01), Bisbing et al.
patent: 3676276 (1972-07-01), Hirsehn et al.
patent: 3808831 (1974-05-01), Landry
patent: 3898775 (1975-08-01), Webb
patent: 4038834 (1977-08-01), Roberts
patent: 4296960 (1981-10-01), Winchester
patent: 4959901 (1990-10-01), Parish
patent: 5007212 (1991-04-01), Fritts et al.
patent: 5035416 (1991-07-01), Burley
patent: 5205086 (1993-04-01), Heim
patent: 5269623 (1993-12-01), Hanson
patent: 5341530 (1994-08-01), Ward
patent: 5555679 (1996-09-01), Scherba

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