![]() Update: See in the comments below that alert readers have provided links to a variety of handy tools for calculating or displaying the SHA-512 hashes (message digests) of files on your Mac, Linux, or Windows computer. Handily, Windows comes with an integrated file hash checker. The preserved file, along with the ack receipt, probably should be preserved for the life of any issued patent, that is for the term of the patent plus the statute of limitations (six years). Do you ignore file hash verification at your own peril Use these tools to verify the file. The top zone shows the hash values of the selected hashes. To compute the hash of a file, you right-click on the file, select Properties, and then click the tab labeled File Hashes. Given that EFS-Web or Patentcenter are likely to fail to actually preserve the uploaded file intact within IFW, you will probably want to make a special point of preserving the uploaded file locally in some very safe place. Hashtab implements its user interface as a Windows Explorer file property page. ![]() #Hashtab window pdfIf you were to upload this PDF file to EFS-Web or to Patentcenter, you could compare this hash with the hash appearing in the Ack Receipt. Having reached that folder, type a command line using the “certutil” ( Microsoft documentation) command like this:Ĭ:\temp>certutil -hashfile x-410.pdf sha512Ġa16c7693bc08c30c834e13f395747b2bd5e76acca111c0eb8e297ee9f43bdba2981ce2ac5cd2cad579c481442bb68f41989dd5d0f7085a7cd09c4528955d2dfĬertUtil: -hashfile command completed successfully. You can open a command line window and navigate to that folder. A simple powershell script that will calculate a hash for a given. Suppose you wish to calculate the SHA-512 hash of this file (what the USPTO calls its “message digest”). the Windows APIs that malware developer did not want the analyst to know without. Suppose you have a file called “x-410.pdf” on your hard drive and it is in your folder called “C:\temp”. ![]() One way to do this is with a command-line utility within Microsoft Windows. ![]() #Hashtab window how toThe practitioner wishing to independently check such things will thus be interested to know how to calculate a SHA-512 hash ( Wikipedia article, what the USPTO calls a “message digest”) of a PDF or DOCX file on the practitioner’s hard drive. In two recent blog articles ( here and here) I have called out the USPTO for programming Patentcenter so that its Acknowledgment Receipts list false information about what a filer uploaded in Patentcenter. ![]()
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