Did You Know...
...that power steering was invented by independent inventor Francis W. Davis? As chief engineer in the 1920s of the truck division of the Pierce Arrow Motor Car Company, he saw how hard it was to steer heavy vehicles. So that he would be able to keep the profits from his future invention, Davis left his job, rented a small engineering shop in Waltham, Mass., and developed a hydraulic power steering system that led to power steering.
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| Number | Title | Issue Date |
| 5870477 | Enciphering/deciphering device and method, and encryption/decryption communication system A plaintext file 41 is enciphered using a file key 44, to generate ciphertext 42. The file key 44 is enciphered using a secret key 47 and a management key 48, respectively, to form an enciphered key 1 (45) and an enciphered key 2 (46). An enciphered file ... | 02/09/1999 |
| 5512977 | Copying machine with encryption function Information is read from a medium such as paper in which information is written. The read information is enciphered. When encryption processing is performed, an encryption key is used. As the encryption key, an encryption key generated for each encryption... | 04/30/1996 |
