License holder summary

RALPH DERR JR is a Professional Engineer licensed to practice in Pennsylvania. The address on file for RALPH DERR JR is DOWNINGTOWN PA 19335. This licensed professional license is not current. The license was granted 03/11/1955 and expired on 01/31/1993.

Pennsylvania

Department of State

RALPH DERR JR
Professional Engineer
License number
PE002578E
Date granted
03/11/1955
Date expires
01/31/1993
Class
Professional Engineer
Status
Inactive
Address
DOWNINGTOWN PA 19335
palicensing.org
ID 16574547
LAST UPDATED 2026-07-15 21:11:27 UTC

This website is unaffiliated with the Department of State. Please verify all information directly with the relevant official government authority.

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