National Security Agency
107Patents
11Active
107Granted
45Portfolio score
Filing activity: Jul 25, 1933 → Apr 19, 2012 · 9 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5937422A | Automatically generating a topic description for text and searching and sorting text by topic using the same | Emerging Cross-Sectional Technologies | 297 | Expired |
| US6922774B2 | Device for and method of secure computing using virtual machines | Physics | 127 | Expired |
| US6298144A | Device for and method of detecting motion in an image | Electricity | 78 | Expired |
| US7020338B1 | Method of identifying script of line of text | Physics | 69 | Expired |
| US5991714A | Method of identifying data type and locating in a file | Physics | 68 | Expired |
| US6331991A | Transmission system using a semiconductor laser and a fiber grating discriminator | Electricity | 68 | Expired |
| US5835912A | Method of efficiency and flexibility storing, retrieving, and modifying data in any language representation | Emerging Cross-Sectional Technologies | 61 | Expired |
| US6013534A | Method of thinning integrated circuits received in die form | Electricity | 59 | Expired |
| US6829355B2 | Device for and method of one-way cryptographic hashing | Electricity | 50 | Expired |
| US6243467A | Method of elliptic curve cryptographic digital signature generation and verification using reduced base tau expansion in non-adjacent form | Electricity | 49 | Expired |
| US7073196B1 | Firewall for processing a connectionless network packet | Electricity | 46 | Expired |
| US6556967B1 | Voice activity detector | Physics | 35 | Expired |
| US6151427A | Tunable optic fiber bandpass filter using flexural acoustic waves | Physics | 34 | Expired |
| US6381568B1 | Method of transmitting speech using discontinuous transmission and comfort noise | Physics | 33 | Expired |
| US5832478A | Method of searching an on-line dictionary using syllables and syllable count | Emerging Cross-Sectional Technologies | 32 | Expired |
| US7010167B1 | Method of geometric linear discriminant analysis pattern recognition | Physics | 31 | Expired |
| US9484155B2 | Thin flexible rechargeable electrochemical energy cell and method of fabrication | Emerging Cross-Sectional Technologies | 30 | Active |
| US5982913A | Method of verification using a subset of claimant's fingerprint | Physics | 29 | Expired |
| US7272245B1 | Method of biometric authentication | Electricity | 22 | Expired |
| US6519362B1 | Method of extracting text present in a color image | Physics | 22 | Expired |
| US6594624B1 | Method of identifying all minimum-cost cutsets in a network | Physics | 21 | Expired |
| US6175625A | Control circuits for electric coding machines | Physics | 20 | Expired |
| US7062043B1 | Method of elliptic curve digital signature using coefficient splitting | Electricity | 20 | Expired |
| US7062044B1 | Method of elliptic curve cryptographic key agreement using coefficient splitting | Electricity | 20 | Expired |
| US6017822A | Method of thinning semiconductor wafer of smaller diameter than thinning equipment was designed for | Electricity | 20 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.