Inventor

ZIMMERMAN ROBERT E

US6 patents

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

ITEL CORP

2 patents

US4233909ANov 18, 1980

Railway car assembly composed of a series of articulately interconnected cars

ITEL CORP44 citations87

US4346790AAug 31, 1982

Articulated car brake system

ITEL CORP17 citations70

NAVISTAR INT CORP

1 patent

US4926331AMay 15, 1990

Truck operation monitoring system

NAVISTAR INT CORP278 citations93

LIFETIME FENCE COMPANY

1 patent

US4580767AApr 8, 1986

Electric fence including a ribbed tubular sleeve insulator

LIFETIME FENCE COMPANY19 citations68

ALTO GARAGE DOOR

1 patent

US4846245AJul 11, 1989

Folding door apparatus

ALTO GARAGE DOOR15 citations61

NORTHROP GRUMMAN SYSTEMS CORP

1 patent

US12494777B2Dec 9, 2025

Josephson microwave switch with a single select line

NORTHROP GRUMMAN SYSTEMS CORP0 citations50