Appeal No. 1999-0236
Application 08/624,173
Sherman also does not disclose two laser diodes.
Honda and Hanson do not cure the deficiencies of Sherman.
Honda discloses the use of two intersecting beams to indicate
the proper focus for the reading camera. This is the same
purpose as the laser diodes at a low intensity level for
focusing in the claims. However, the laser beam irradiators
in Honda are used only for focusing and not to illuminate the
symbol sufficiently for scanning. The adjustable infrared
diodes 9 in the illumination blocks 10 are used to illuminate
the symbol for scanning. The laser beam irradiators operate
only at one intensity level. Hanson discloses a pair of LEDs
that is used for scanning. This is the same purpose as the
laser diodes at a high intensity level for scanning in the
claims. However, a single pair of LEDs is not used for
focusing at a fixed distance. The plurality of pairs of LEDs
are used to focus at different distances. The LEDs operate at
only one intensity level. Thus, while Honda and Hanson
disclose using a pair of LEDs for two different purposes,
focusing and scanning, neither Honda or Hanson discloses
operating the LEDS at a low intensity for focusing and at a
high intensity for scanning the symbol. Moreover, the
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