Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Method and apparatus for an optical laser keypad










Image Number 3 for United States Patent #6525677.

An optical laser numeric keypad (100) provides a digital signal indicative of which of a plurality of key locations is selected. The optical laser numeric keypad (100) comprises a plurality of optical sensors (132 and 134) each configured to respond to a change in a received light quantity and to provide an electrical signal in response to a selection of a key at a key location. The received light quantity of at least one of the plurality of optical sensors (132 and 134) is changeable by selection of a key location.








 
 
  Recently Added Patents
Matching geometry generation and display of mammograms and tomosynthesis images
Light-emitting diode package and method for manufacturing the same
Powerline communication receiver
Lubricant composition and antioxident composition
Cosmetic or pharmaceutical peptides containing uncoded amino acids and their use in the treatment and/or care of the skin, mucous membranes, or scalp
Developing cartridge
Method or system for investing and/or trading
  Randomly Featured Patents
Apparatus for delivering laying paper for closet seat
Dual purpose closure for heat exchangers
Visual inspection apparatus, visual inspection method, and peripheral edge inspection unit that can be mounted on visual inspection apparatus
Process for extrusion blowing of thermoplastic hollow articles and gripper device for drawing the parison into the blow mold
Long path flow cell resistant to corrosive environments for fiber optic spectroscopy
Promoter for epidermis-specific, pathogen-inducible transgenic expression in plants
System and method for transforming graphical images
Washing solution of semiconductor substrate and washing method using the same
Hand-held power tool
Topical composition for accelerating wound healing