	US 12,217,108 B2
	Laser marking of machine-readable codes
Tomas Filler, Beaverton, OR (US); Vojtech Holub, Lafayette, CO (US); Hugh L. Brunk, Portland, OR (US); and Adnan M. Alattar, Tigard, OR (US)
Assigned to Digimarc Corporation, Beaverton, OR (US)
Filed by Digimarc Corporation, Beaverton, OR (US)
Filed on Dec. 8, 2022, as Appl. No. 18/077,914.
Application 18/077,914 is a continuation in part of application No. 17/339,711, filed on Jun. 4, 2021, granted, now 11,710,020.
Claims priority of provisional application 63/287,289, filed on Dec. 8, 2021.
Claims priority of provisional application 63/113,700, filed on Nov. 13, 2020.
Claims priority of provisional application 63/086,534, filed on Oct. 1, 2020.
Claims priority of provisional application 63/038,735, filed on Jun. 12, 2020.
Prior Publication US 2023/0177297 A1, Jun. 8, 2023
Int. Cl. G06K 19/06 (2006.01)

CPC G06K 19/06037 (2013.01)

20 Claims

1. A system for marking a workpiece, the system comprising first and second laser emitters and a controller, the controller being configured by control instructions to direct laser illumination from said laser emitters to locations on the workpiece at which marks are to be formed, wherein said control instructions configure the laser emitters to turn on and off independently of each other, yet the marks formed by the first and second laser emitters cooperate to form an area of 2D machine-readable coding from which a plural symbol payload is extractable by a compliant decoder.