US Patent Issued to Illinois Tool Works on July 22 for "Systems and methods to calibrate optical extensometers" (Massachusetts Inventors)

ALEXANDRIA, Va., July 23 -- United States Patent no. 12,368,840, issued on July 22, was assigned to Illinois Tool Works Inc. (Glenview, Ill.).

"Systems and methods to calibrate optical extensometers" was invented by Richard Balcarek (South Easton, Mass.), Martin Allen Peterson (Wrentham, Mass.) and Michael Ashman (Natick, Mass.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Disclosed example video extensometers include: a load string configured to secure a test specimen; an imaging device configured to capture images of a surface of the test specimen when secured in the load string; a storage device configured to store a plurality of first calibration parameters corresponding to intrinsic properties of the i...