Electric heating – Metal heating – By arc
Patent
1989-10-31
1992-02-11
Albritton, C. L.
Electric heating
Metal heating
By arc
2191217, 21912182, B23K 2600
Patent
active
050878050
ABSTRACT:
A method of simultaneously encoding successive groups of printed paper sheets or mass distributable material wherein the sheets are provided with unperceptable and virtually invisible common code pattern by laser means which is supplied with a distinct series of coded pulse signals in synchronism with control pulses to produce a different optically-scannable coded hole pattern on each group of printed sheets.
REFERENCES:
patent: 4316073 (1982-02-01), Lemelson
patent: 4523777 (1985-06-01), Holbein
patent: 4675498 (1987-06-01), Lemelson
patent: 4692394 (1987-09-01), Drexler
patent: 4711996 (1987-12-01), Drexler
patent: 4774522 (1988-09-01), Van Tongeren
patent: 4939888 (1990-07-01), Katz et al.
Dennis Michael
Hipko George P.
Silverschotz Stanford
Albritton C. L.
Webcraft Technologies Inc.
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