The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 28, 2025
Filed:
Nov. 01, 2022
Nxp B.v., Eindhoven, NL;
Wilhelmus Petrus Adrianus Johannus Michiels, Reusel, NL;
Jan Hoogerbrugge, Helmond, NL;
NXP B.V., Eindhoven, NL;
Abstract
A method is provided for protecting a machine learning (ML) model from being copied. An input sample is provided to the ML model for an inference operation. Features from an internal layer of the ML model relating to the sample are selected. Positive gradients of the features to output logits of the ML model are selected. A summation of a product of the positive gradients and the features is computed to determine a feature contribution value. The input sample is a non-problem domain sample if the feature contribution value is less than or equal to a predetermined threshold feature contribution value. An attempt to copy the ML model is determined to be underway if a predetermined percentage of a plurality of input samples input to the ML model has a feature contribution value that is less than or equal to the predetermined threshold feature contribution value.