SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 13D

Under the Securities Exchange Act of 1934

(Amendment No. 3)*

Hickok Incorporated

(Name of Issuer)

 Class A Common Shares, $1.00 par value

(Title of Class of Securities)

428839 10 4

(CUSIP Number)

Robert E. Robotti

c/o Robotti & Company, Incorporated

52 Vanderbilt Avenue, 4th Floor

New York, New York 10017

(212) 986-4800

(Name, Address and Telephone Number of Person

Authorized to Receive Notices and Communications)

February 29, 2008

(Date of Event Which Requires Filing of This Statement)

If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of Rule 13d-1(e), 13d-1(f) or 13d-1(g), check the following box. [  ]

Note: Schedules filed in paper format shall include a signed original and five copies of the schedule, including all exhibits.  See 13d-7 for other parties to whom copies are to be sent.

(Page 1 of 9 Pages)

*The remainder of this cover page shall be filled out for a reporting person's initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter the disclosures provided in a prior cover page.

The information required in the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

Schedule 13D
CUSIP No. 428839 10 4				Page 2 of 9 Pages
1.	Names of Reporting Persons. Robert E. Robotti
2.	Check the Appropriate Box if a Member of a Group (See Instructions)
	(a)
	(b)
3.	SEC Use Only
4.	Source of Funds
	AF
5.	Check if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d) or 2(e)				[  ]
6.	Citizenship or Place of Organization
	United States
Number of		7.	Sole Voting Power: -0-
Shares
Beneficially		8.	Shared Voting Power: 104,339
Owned by
Each		9.	Sole Dispositive Power: -0-
Reporting
Person With		10.	Shared Dispositive Power: 104,339
11.	Aggregate Amount Beneficially Owned by Each Reporting Person
	104,339
12.	Check if the Aggregate Amount in Row (11) Excludes Certain Shares [  ]
13.	Percent of Class Represented by Amount in Row (11)
	13.3%
14.	Type of Reporting Person (See Instructions)
	IN, HC

Schedule 13D
CUSIP No. 428839 10 4				Page 3 of 9 Pages
1.	Names of Reporting Persons. Kenneth R. Wasiak
2.	Check the Appropriate Box if a Member of a Group (See Instructions)
	(a)
	(b)
3.	SEC Use Only
4.	Source of Funds
	AF
5.	Check if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d) or 2(e)				[  ]
6.	Citizenship or Place of Organization
	United States
Number of		7.	Sole Voting Power: -0-
Shares
Beneficially		8.	Shared Voting Power: 104,339
Owned by
Each		9.	Sole Dispositive Power: -0-
Reporting
Person With		10.	Shared Dispositive Power: 104,339
11.	Aggregate Amount Beneficially Owned by Each Reporting Person
	104,339
12.	Check if the Aggregate Amount in Row (11) Excludes Certain Shares [  ]
13.	Percent of Class Represented by Amount in Row (11)
	13.3%
14.	Type of Reporting Person (See Instructions)
	IN, HC

Schedule 13D
CUSIP No. 428839 10 4				Page 4 of 9 Pages
1.	Names of Reporting Persons. Ravenswood Management Company, L.L.C.
2.	Check the Appropriate Box if a Member of a Group (See Instructions)
	(a)
	(b)
3.	SEC Use Only
4.	Source of Funds
	AF
5.	Check if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d) or 2(e)				[  ]
6.	Citizenship or Place of Organization
	New York
Number of		7.	Sole Voting Power: -0-
Shares
Beneficially		8.	Shared Voting Power: 104,339
Owned by
Each		9.	Sole Dispositive Power: -0-
Reporting
Person With		10.	Shared Dispositive Power: 104,339
11.	Aggregate Amount Beneficially Owned by Each Reporting Person
	104,339
12.	Check if the Aggregate Amount in Row (11) Excludes Certain Shares [  ]
13.	Percent of Class Represented by Amount in Row (11)
	13.3%
14.	Type of Reporting Person (See Instructions)
	OO

Schedule 13D
CUSIP No. 428839 10 4				Page 5 of 9 Pages
1.	Names of Reporting Persons. The Ravenswood Investment Company, L.P.
2.	Check the Appropriate Box if a Member of a Group (See Instructions)
	(a)
	(b)
3.	SEC Use Only
4.	Source of Funds
	WC
5.	Check if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d) or 2(e)				[  ]
6.	Citizenship or Place of Organization
	New York
Number of		7.	Sole Voting Power: -0-
Shares
Beneficially		8.	Shared Voting Power: 73,854
Owned by
Each		9.	Sole Dispositive Power: -0-
Reporting
Person With		10.	Shared Dispositive Power: 73,854
11.	Aggregate Amount Beneficially Owned by Each Reporting Person
	73,854
12.	Check if the Aggregate Amount in Row (11) Excludes Certain Shares [  ]
13.	Percent of Class Represented by Amount in Row (11)
	9.4%
14.	Type of Reporting Person (See Instructions)
	PN

Schedule 13D
CUSIP No. 428839 10 4				Page 6 of 9 Pages
1.	Names of Reporting Persons. Ravenswood Investments III, L.P.
2.	Check the Appropriate Box if a Member of a Group (See Instructions)
	(a)
	(b)
3.	SEC Use Only
4.	Source of Funds
	WC
5.	Check if Disclosure of Legal Proceedings Is Required Pursuant to Items 2(d) or 2(e)				[  ]
6.	Citizenship or Place of Organization
	New York
Number of		7.	Sole Voting Power: -0-
Shares
Beneficially		8.	Shared Voting Power: 30,485
Owned by
Each		9.	Sole Dispositive Power: -0-
Reporting
Person With		10.	Shared Dispositive Power: 30,485
11.	Aggregate Amount Beneficially Owned by Each Reporting Person
	30,485
12.	Check if the Aggregate Amount in Row (11) Excludes Certain Shares [  ]
13.	Percent of Class Represented by Amount in Row (11)
	3.9%
14.	Type of Reporting Person (See Instructions)
	PN

SCHEDULE 13D
CUSIP No. 428839 10 4					Page 7 of 9 Pages
This Statement on Schedule 13D Amendment No. 3 (this "Statement") is filed on behalf of the Reporting Persons with the Securities and Exchange Commission (the "Commission").  This Statement amends the Statement on Schedule 13D relating to shares of Class A Common Shares, $1.00 par value (the "Common Shares"), of Hickok Incorporated (the "Issuer") filed on December 26, 2006 with the Commission as amended by Amendment No. 1 and Amendment No. 2 thereto, filed on February 23, 2007 and February 14, 2008 with the Commission (as so amended, the "Amended Statement"), as specifically set forth herein.  Capitalized terms used herein and not otherwise defined herein shall have the same meanings ascribed to them in the Amended Statement.
Item 3.	Source and Amount of Funds or Other Consideration
Item 3 of the Amended Statement is hereby amended and restated to read as follows:
The aggregate purchase price of the 73,854 Common Shares held by RIC is $683,937.77 (including brokerage fees and expenses).  All of the Common Shares held by RIC were paid for using its working capital.
The aggregate purchase price of the 30,485 Common Shares held by RIC is $261,121.92 (including brokerage fees and expenses).  All of the Common Shares held by RI were paid for using its working capital.
Item 5.	Interest in Securities of the Issuer
Item 5 of the Amended Statement is hereby amended and restated to read as follows:
(a)-(b) As of March 5, 2008, the aggregate number of Common Shares and percentage of the outstanding Common Shares of the Issuer beneficially owned (i) by each of the Reporting Persons, and (ii) to the knowledge of the Reporting Persons, by each other person who may be deemed to be a member of a group, is as follows:
Reporting Person		Aggregate Number of Shares	Number of Shares: Sole Power to Vote or Dispose	Number of Shares: Shared Power to Vote or Dispose	Approximate Percentage*
Robotti (1)(2)(3)		104,339	0	104,339	13.32%
Wasiak (1)(2)(3)		104,339	0	104,339	13.32%
RMC (1)(2)(3)		104,339	0	104,339	13.32%
RIC (1)(2)		73,854	0	73,854	9.43%
RI(1)(3)		30,485	0	30,485	3.89%
* Based on 783,229 Class A Common Shares, $1.00 par value, outstanding as of February 8, 2008, as disclosed in the Issuer's Quarterly Report on Form 10-QSB, for the quarter ended December 31, 2007.               (1) Each of the Reporting Persons disclaims beneficial ownership of the securities held by any other Reporting Person.               (2) Each of Messrs. Robotti and Wasiak and RMC share with RIC the power to vote or direct the vote, and share the power to dispose or to direct the disposition, of 73,854 Common Shares owned by RIC.               (3) Each of Messrs. Robotti and Wasiak and RMC share with RI the power to vote or direct the vote, and share the power to dispose or to direct the disposition, of 30,485 Common Shares owned by RI.
(c) The table below lists all the transactions in the Issuer's Common Shares since the most recent filing of this Schedule 13D by the Reporting Persons.  All such transactions were made by RIC and RI in the open market.

SCHEDULE 13D
CUSIP No. 428839 10 4						Page 8 of 9 Pages
Transactions in Shares Since the Most Recent Filing of this Schedule 13D
Party			Date of Purchase or Sale	Number of Common Shares	Buy/Sell		Price Per Share
RIC			02/29/2008	6,830	BUY		$11.995
RI			02/29/2008	2,927	BUY		$11.995
	(d)	No Person other than the Reporting Persons is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such Common Shares beneficially owned by the Reporting Persons.
	(e)	Not Applicable.
(The remainder of this page was intentionally left blank)

SCHEDULE 13D
CUSIP No. 428839 10 4					Page 9 of 9 Pages
SIGNATURE
After reasonable inquiry and to the best of the undersigned's knowledge and belief, each of the undersigned certifies that the information set forth in this statement is true, complete and correct.
Date:		March 5, 2008
	/s/ Robert E. Robotti			/s/ Kenneth R. Wasiak
	Robert E. Robotti			Kenneth R. Wasiak
Ravenswood Management Company, L.L.C.			The Ravenswood Investment Company, L.P.
By:	/s/ Robert E. Robotti		By:	Ravenswood Management Company, L.L.C.
	Name: Robert E. Robotti			Its General Partner
	Title: Managing Member
Ravenswood Investments III, L.P.			By:	/s/ Robert E. Robotti
				Name: Robert E. Robotti
By:	Ravenswood Management Company, L.L.C.			Title: Managing Member
	Its General Partner
By:	/s/ Robert E. Robotti
	Name: Robert E. Robotti
	Title: Managing Member