Static structures (e.g. – buildings) – Stepped; e.g. – stair – Tread unit on horizontal tread member connected to riser
Patent
1991-11-18
1992-12-01
Chilcot, Jr., Richard E.
Static structures (e.g., buildings)
Stepped; e.g., stair
Tread unit on horizontal tread member connected to riser
52183, 52189, 52191, E04F 1100
Patent
active
051671026
ABSTRACT:
A reversible footboard for staircase is capable of changing the pattern on the same footboard by decorating the obverse and reverse surfaces thereof with different patterns. The reversible footboard for staircase to be fixed to notchboards for forming a staircase comprises a flat portion decorated with different patterns on obverse and reverse surfaces thereof either of which serves as a footstep portion, an upward projecting portion provided on one end of the flat portion for serving as a riser and a downward projecting portion provided on the other end of the flat portion.
REFERENCES:
patent: 1716224 (1929-06-01), Friderichsen
patent: 1731300 (1929-10-01), Ehlers
patent: 3311996 (1967-04-01), Bergener
patent: 3981112 (1976-09-01), Dake
patent: 4355700 (1982-10-01), Matthews et al.
Kobayashi Takashi
Nakatsubo Masafumi
Canfield Robert J.
Chilcot Jr. Richard E.
Tsuda Corporation
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