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US 5,331,473 AGranted
Controlled reflection viewing system
OwnerT. Douglas Peterseninventor
Life of this patent
Estimating the term…
Abstract
An improved double-lensed viewing system having a first lens or shield formed of shatterproof glass or plastic and mounted at an angle of at least 05.degree. from the vertical, together with a second lens or shield formed of partially opaque material mounted in optical alignment with the first lens or shield and extending parallel to the vertical.
Claims9
A viewing system comprising:
- a support member,
- a frame mounted on said support member,
- a pair of lenses mounted within said frame in optical alignment with each other and with one of said lenses mounted at an angle of at least 05.degree. with respect to the other.
Dependencies are inferred from the claim text.