Appeal No. 2001-2019
Application No. 08/996,567 Page 13
We find that Markl (col.1, lines 8-11) is directed to a
signal light system, to be provided along roads and highways.
Markl discloses that it is known to provide emergency-phone
stations at intervals along the highway, that have signal light
systems that are caused to blink, in order to warn drivers that
they are approaching an accident or the like (col. 1, lines 8-
20). More complicated versions of highway blinking light systems
involve a series of emergency phone stations, at which, in the
event of an upcoming traffic hazard, a first activated system may
have only one of its flash lamps in blinking operation. The next
station closer to the accident site has two of its lights
blinking, and the station closest to the accident having three of
its lamps blinking, to provide the effect of increasing urgency
(col. 1, lines 47-63). Markl further discloses (col. 4, lines 6-
17) that
In accordance with a further concept of the
invention, resort is had to a synchronization
or central clocking technique, to which are
referenced all moments at which flashing occurs,
and therefore the starts and ends of all interflash
intervals, at all flash lamps of each individual
station, and at all flash lamps of all stations
in a series of activated stations. Although such
a synchronization or central clocking technique
is not needed per se for the display effects to be
implemented, it constitutes a singularly effective
approach to the confusion presented by the various
time-constants.
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