Inventor
GRANDFIELD WALTER J
US7 patents
⚠️ This page may combine multiple inventors who share the name “GRANDFIELD WALTER J”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
MOTOROLA INC
6 patentsUS4814763AMar 21, 1989
Paging terminal apparatus with page forwarding capability and methodology thereof
MOTOROLA INC192 citations97
US5448772ASep 5, 1995
Stacked double balanced mixer circuit
MOTOROLA INC116 citations96
US4811379AMar 7, 1989
Speak back paging system
MOTOROLA INC96 citations94
US4928314AMay 22, 1990
Heterodyne stage having precise closed-loop control of the amplitude of the injection signal thereof
MOTOROLA INC28 citations92
US4862015AAug 29, 1989
Constant propagation delay current reference
MOTOROLA INC27 citations91
US4928086AMay 22, 1990
Pager receiver having a common timer circuit for both sequential lock-out and out-of-range
MOTOROLA INC12 citations71