Undertaking
Patent
1977-12-15
1980-04-22
Browne, William R.
Undertaking
A63B 900
Patent
active
041991389
ABSTRACT:
A gymnastics and game apparatus formed of a plurality of large-scale structural members made of a plastic material in a box-shaped elongate configuration having patterns of recesses in the form of mortise openings and grooves in at least two opposite longitudinal lateral walls, and plug connectors for interconnecting structural members or attaching various elements such as bars, rods or the like to the structural members, the plug connectors having a configuration mating the mortises and grooves on the structural members.
REFERENCES:
patent: 3982754 (1976-09-01), de Moreau
Browne William R.
Geratebau Albin Grunzig & Co.
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