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Form SC 13G/A - Statement of Beneficial Ownership by Certain Investors: [Amend]
SEC Accession No. 0001086364-10-008817
Filing Date
2010-02-09
Accepted
2010-02-09 14:50:19
Documents
1

Document Format Files

Seq Description Document Type Size
1 keithleyinstru012910.txt SC 13G/A 11778
  Complete submission text file 0001086364-10-008817.txt   13837
Mailing Address
Business Address 28775 AURORA RD SOLON OH 44139 2162480400
KEITHLEY INSTRUMENTS INC (Subject) CIK: 0000054991 (see all company filings)

IRS No.: 340794417 | State of Incorp.: OH | Fiscal Year End: 0930
Type: SC 13G/A | Act: 34 | File No.: 005-37166 | Film No.: 10583918
SIC: 3825 Instruments For Meas & Testing of Electricity & Elec Signals

Mailing Address 55 EAST 52ND STREET NEW YORK NY 10055
Business Address 55 EAST 52ND STREET NEW YORK NY 10055 212-810-5300
BlackRock Inc. (Filed by) CIK: 0001364742 (see all company filings)

IRS No.: 320174431 | State of Incorp.: DE | Fiscal Year End: 0226
Type: SC 13G/A
SIC: 6211 Security Brokers, Dealers & Flotation Companies