Sundial with dome and grid of light

Details Sundial with dome and grid of light Sundial with dome and grid of light

2010-09-10

2011-11-29

Bennett, G. Bradley (Department: 2841)

Geometrical instruments

Straight-line light ray type

Celestial

Reexamination Certificate

active

08065808

ABSTRACT:
Sundial apparatus with overlying barrier grid.

REFERENCES:
patent: 2762123 (1956-09-01), Schultz et al.
patent: 4028813 (1977-06-01), Eldridge
patent: 4520572 (1985-06-01), Spilhaus
patent: 5062212 (1991-11-01), Blaker
patent: 5197199 (1993-03-01), Shrader
patent: 5596553 (1997-01-01), Kellogg
patent: 6009628 (2000-01-01), Mizushima
patent: 7114262 (2006-10-01), Andrewes
patent: 7555840 (2009-07-01), Chen
patent: 2005/0060900 (2005-03-01), Maegli
patent: 2005/0120570 (2005-06-01), Bastian

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