Inventor
PFEIFER ROBERT F
US10 patents
⚠️ This page may combine multiple inventors who share the name “PFEIFER ROBERT F”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
MOTOROLA INC
6 patentsUS4888801ADec 19, 1989
Hierarchical key management system
MOTOROLA INC108 citations95
US4281216AJul 28, 1981
Key management for encryption/decryption systems
MOTOROLA INC54 citations93
US4352952AOct 5, 1982
Data security module
MOTOROLA INC70 citations92
USD263395SMar 16, 1982
Multiple module serial link encryption unit or similar article
MOTOROLA INC24 citations80
USD264843SJun 8, 1982
Multiple module serial link encryption unit or similar article
MOTOROLA INC10 citations71
USD255899SJul 15, 1980
Code entry terminal for security access system
MOTOROLA INC14 citations71
NCR CO
4 patentsUS4516313AMay 14, 1985
Unified CMOS/SNOS semiconductor fabrication process
NCR CO33 citations92
US4391650AJul 5, 1983
Method for fabricating improved complementary metal oxide semiconductor devices
NCR CO36 citations91
US4422885ADec 27, 1983
Polysilicon-doped-first CMOS process
NCR CO50 citations89
US4534104AAug 13, 1985
Mixed dielectric process and nonvolatile memory device fabricated thereby
NCR CO3 citations59