07083299 is referenced by 20 patents and cites 56 patents.

A flashlight has a lens or lenses moveable relative to one or more LED or other light source. The beam of light provided by the LED can be focused and provides a uniform light pattern across the range of focus. The lenses are supported on a front housing section and the LED is supported on a back housing section threaded onto the front housing section. Twisting the front housing section closes a switch providing power to the LED, to turn the flashlight on. One or more circuit modules within the flashlight provides various operating modes including an automatic shut-off timer, to preserve battery life, a dimmer controlled by turning an end cap, a blinking function, and/or a current control function to provide maximum brightness regardless of battery condition.

Title
Flashlight having convex-concave lens
Application Number
10/922813
Publication Number
7083299 (B2)
Application Date
August 19, 2004
Publication Date
August 1, 2006
Inventor
Leonard T Chapman
North Hollywood
CA, US
Agent
Perkins Coie
Assignee
Chapman Leonard Enterprises
CA, US
IPC
F21L 4/04
F21V 5/04
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