Patents by Inventor Charles R. Myers, IV

Charles R. Myers, IV has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Using digital certificates in document distribution
    Patent number: 8688997
    Abstract: One embodiment of the present invention provides a system that uses digital certificates to facilitate enforcing licensing terms for applications that manipulate documents. During operation, the system obtains a credential, wherein the credential includes a private key and a digital certificate containing a corresponding public key. This digital certificate also contains a profile specifying allowed operations which can be performed on documents signed with the credential. Next, the system digitally signs a document using the credential, so that the resulting signed document is signed with the private key and includes a copy of the digital certificate with the profile specifying the allowed operations. The certificate issuer can subsequently revoke the digital certificate (which effectively revokes the license) if teens of a license agreement associated with the digital certificate are violated.
    Type: Grant
    Filed: September 9, 2011
    Date of Patent: April 1, 2014
    Assignee: Adobe Systems Incorporated
    Inventors: Sujata Das, Sunil C. Agrawal, Charles R. Myers, IV
  • Using digital certificates to facilitate enforcement of product licenses
    Patent number: 8024561
    Abstract: One embodiment of the present invention provides a system that uses digital certificates to facilitate enforcing licensing terms for applications that manipulate documents. During operation, the system obtains a credential, wherein the credential includes a private key and a digital certificate containing a corresponding public key. This digital certificate also contains a profile specifying allowed operations which can be performed on documents signed with the credential. Next, the system digitally signs a document using the credential, so that the resulting signed document is signed with the private key and includes a copy of the digital certificate with the profile specifying the allowed operations. The certificate issuer can subsequently revoke the digital certificate (which effectively revokes the license) if teens of a license agreement associated with the digital certificate are violated.
    Type: Grant
    Filed: July 22, 2009
    Date of Patent: September 20, 2011
    Assignee: Adobe Systems Incorporated
    Inventors: Sujata Das, Sunil C. Agrawal, Charles R. Myers, IV
  • Using digital certificates to facilitate enforcement of product licenses
    Patent number: 7581106
    Abstract: One embodiment of the present invention provides a system that uses digital certificates to facilitate enforcing licensing terms for applications that manipulate documents. During operation, the system obtains a credential, wherein the credential includes a private key and a digital certificate containing a corresponding public key. This digital certificate also contains a profile specifying allowed operations which can be performed on documents signed with the credential. Next, the system digitally signs a document using the credential, so that the resulting signed document is signed with the private key and includes a copy of the digital certificate with the profile specifying the allowed operations. The certificate issuer can subsequently revoke the digital certificate (which effectively revokes the license) if terms of a license agreement associated with the digital certificate are violated.
    Type: Grant
    Filed: April 20, 2005
    Date of Patent: August 25, 2009
    Assignee: Adobe Systems Incorporated
    Inventors: Sujata Das, Sunil C. Agrawal, Charles R. Myers, IV