Inventor
JOHNSON JR ROBERT M
US11 patents
⚠️ This page may combine multiple inventors who share the name “JOHNSON JR ROBERT M”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
MOTOROLA INC
9 patentsUS5014346AMay 7, 1991
Rotatable contactless antenna coupler and antenna
MOTOROLA INC152 citations98
US4868576ASep 19, 1989
Extendable antenna for portable cellular telephones with ground radiator
MOTOROLA INC174 citations98
US5428836AJun 27, 1995
Radio receiver for forming a baseband signal of time-varying frequencies
MOTOROLA INC63 citations92
US5321847AJun 14, 1994
Apparatus and method for detecting intermodulation distortion in a radio frequency receiver
MOTOROLA INC49 citations92
US5017856AMay 21, 1991
Battery charging system
MOTOROLA INC32 citations92
US5511235AApr 23, 1996
Apparatus for detecting a signaling channel during scanning including a controlled frequency converter circuit and a controlled filter bandwidth, and a method therefor
MOTOROLA INC46 citations91
US5940746AAug 17, 1999
Channel scanning apparatus and method
MOTOROLA INC21 citations88
US6298224B1Oct 2, 2001
Multiple frequency band receiver
MOTOROLA INC26 citations87
US6381477B1Apr 30, 2002
Method and apparatus for protecting a circuit module in a communication device
MOTOROLA INC43 citations86