SC 13D/A | SEC Filings Hub

Filing metadata

Accession number: 0000950123-10-033682
Form type: SC 13D
Filer: KEITHLEY INSTRUMENTS INC
CIK: CIK 54991
Filed: Apr 09, 2010
Reporting period: Apr 01, 2010
Description: Activist stake

Documents

0000950123-10-033682-index.htm

Complete submission

0000950123-10-033682.txt

directory listing

Filed by

KEITHLEY INSTRUMENTS INC