Clipboard having a whistle integrally formed therewith

Details Clipboard having a whistle integrally formed therewith Clipboard having a whistle integrally formed therewith

1993-03-29

1994-05-17

Scherbel, David A.

Supports

Easel; book, copy or music score holder

With article gripping means

2484411, A47B 9704

Patent

active

053120825

ABSTRACT:
A clipboard includes a backing board on which a clip member is mounted pivotally, a torsional spring unit arranged between the backing board and the clip member so as to bias one end of the clip member to abut against the backing board, and a whistle formed integrally with the clip member.

REFERENCES:
patent: 2492034 (1949-12-01), Clyne
patent: 2782748 (1957-02-01), Zegarowitz
patent: 4709651 (1987-12-01), Lance
patent: 4892334 (1990-01-01), Sinclair
patent: 5040673 (1991-08-01), Huang et al.
patent: 5086726 (1992-02-01), Sharp
patent: 5180133 (1993-01-01), Chang

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