Issued Patents All Time
Showing 1–25 of 64 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11741332 | Securing cryptographic keys | — | 2023-08-29 |
| 11405186 | Using virtual blockchain protocols to implement a fair electronic exchange | — | 2022-08-02 |
| 11270184 | Counterfeit prevention | — | 2022-03-08 |
| 10803374 | Counterfeit prevention | — | 2020-10-13 |
| 10607234 | Counterfeit prevention | Srinivas Devadas | 2020-03-31 |
| 9654298 | Signature # efficient real time credentials for OCSP and distributed OCSP | David Engberg, Phil Libin | 2017-05-16 |
| 9461828 | Signature-efficient real time credentials for OCSP and distributed OCSP | David Engberg, Phil Libin | 2016-10-04 |
| 9449443 | Logging access attempts to an area | Phil Libin, David Engberg | 2016-09-20 |
| 9230375 | Physical access control | David Engberg, Phil Libin, Leo Reyzin, Alex Sinelnikov | 2016-01-05 |
| 9158288 | Logging access attempts to an area | Phil Libin, David Engberg | 2015-10-13 |
| 9143330 | Efficient and secure data currentness systems | Phil Libin, Brandon Volbright | 2015-09-22 |
| 8983874 | Method and system for micropayment transactions | Ronald L. Rivest | 2015-03-17 |
| 8732457 | Scalable certificate validation and simplified PKI management | — | 2014-05-20 |
| 8327149 | Efficient and secure data currentness systems | Phil Libin, Brandon Volbright | 2012-12-04 |
| 8261319 | Logging access attempts to an area | Phil Libin, David Engberg | 2012-09-04 |
| 8171524 | Physical access control | David Engberg, Phil Libin, Leo Reyzin, Alex Sinelnikov | 2012-05-01 |
| 8015597 | Disseminating additional data used for controlling access | Phil Libin, David Engberg, Alex Sinelnikov | 2011-09-06 |
| 7966487 | Communication-efficient real time credentials for OCSP and distributed OCSP | David Engberg, Phil Libin | 2011-06-21 |
| 7827401 | Efficient certificate revocation | — | 2010-11-02 |
| 7822989 | Controlling access to an area | Phil Libin, David Engberg | 2010-10-26 |
| 7716486 | Controlling group access to doors | Phil Libin, David Engberg | 2010-05-11 |
| 7660994 | Access control | Phil Libin | 2010-02-09 |
| 7657751 | Efficient and secure data currentness systems | Phil Libin, Brandon Volbright | 2010-02-02 |
| 7600129 | Controlling access using additional data | Phil Libin, David Engberg, Alex Sinelnikov | 2009-10-06 |
| 7529928 | Certificate revocation system | — | 2009-05-05 |