P

Inventor

SENGUPTA UPAL

US9 patents
⚠️ This page may combine multiple inventors who share the name “SENGUPTA UPAL”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

ZENITH DATA SYSTEMS CORP

3 patents
US5541490AJul 30, 1996

Computer power supply system

ZENITH DATA SYSTEMS CORP110 citations98
US5629604AMay 13, 1997

Computer power supply system

ZENITH DATA SYSTEMS CORP30 citations95
US5561361AOct 1, 1996

Computer power supply and battery recharging system

ZENITH DATA SYSTEMS CORP70 citations95

PACKARD BELL NEC

2 patents
US5847546ADec 8, 1998

System and apparatus for generating a continuosly variable reference signal for controlling battery cell charging

PACKARD BELL NEC39 citations94
US5838141ANov 17, 1998

Method for generating a continuously variable reference signal for controlling battery cell charging

PACKARD BELL NEC24 citations90

RAY O VAC CORP

2 patents
US5661393AAug 26, 1997

Circuit and method for detecting and indicating the state of charge of a cell or battery

RAY O VAC CORP45 citations92
US5652496AJul 29, 1997

Electrical device having a discriminating, rechargeable battery system

RAY O VAC CORP21 citations83

MOTOROLA INC

1 patent
US6320354B1Nov 20, 2001

Method and apparatus for battery charging

MOTOROLA INC64 citations95

NEC CORP

1 patent
US6134612AOct 17, 2000

External modular bay for housing I/O devices

NEC CORP35 citations89