4.7

Form of Warrant to Purchase Common Stock (Swartz Family Partnership, L.P.) dated (1) June 2, 1997 exercisable to purchase an aggregate of 211,733 common shares at $1.69125 per share until June 2, 2002, granted to a group of investors in connection with the offering of securities in Exhibit 4.4 incorporated by reference to Exhibit 4.7 to Form 8-K dated June 16, 1997

4.8

Registration Rights Agreement dated June 2, 1997 by and among the Company and (1) Swartz Investments, LLC related to the registration of the common stock related to Exhibit 4.7 incorporated by reference to Exhibit 4.8 to Form 8-K dated June 16,1997

4.9

Form of 5% Convertible Term Debenture (CC Investments, LDC) due June 2,1999 (1) aggregating $1,000,000 to two investors incorporated by reference to Exhibit 4.9 to Form 10-KSB for the fiscal year ended May 31, 1998

4.10

Form of Stock Purchase Warrant (CC Investments, LDC) dated November 24,1997 (1) exercisable to purchase an aggregate of 200,000 common shares at $1.50 per share until June 2, 2002, granted to two investors in connection with the offering of securities described in Exhibit 4.9 incorporated by reference to Exhibit 4.10 to Form 10-KSB for the year ended May 31, 1998

4.11

Form of Warrant to Purchase Common Stock (Swartz Family Partnership, L.P.) dated (1) November 24, 1997 exercisable to purchase an aggregate of 105,867 common shares at $1.50 per share until June 2, 2002, granted to a group of investors in connection with the offering of securities described in Exhibit 4.9 incorporated by reference to Exhibit 4.11 to Form 10-KSB for the year ended May 31,1998

4.12

Form of Warrant to Purchase Common Stock (Investor Communications Group, Inc.) (1) dated June 16, 1997 exercisable to purchase an aggregate of 130,000 common shares at prices ranging from $2.50 to $7.50 per share until June 15, 1999incorporated by reference to Exhibit 4.12 to Form 10-KSB for the year ended May 31, 1998

4.13

Warrant to Purchase Common Stock issued to Spellcaster Telecommunications, Inc. (1) dated April 28, 1998 exercisable to purchase an aggregate of 100,000 common shares at $1.25 per share until April 28, 2000incorporated by reference to Exhibit 4.13 to Form 10-KSB for the year ended May 31, 1998

4.14

Investment agreement dated February 24, 1999 by and between the Company and Swartz (1) Private Equity, LLC for a maximum aggregate amount of $5,000,000 incorporated by reference to Exhibit 4.14 to Form 10-QSB/A for the fiscal quarter ended November 30, 1998

4.15

Registration Rights Agreement dated February 24, 1999 by and between the Company (1) and Swartz Private Equity, LLC related to the registration of the common stock related to Exhibit 4.14 incorporated by reference to Exhibit 4.15 to Form 10-QSB/A for the fiscal quarter ended November 30, 1998

4.16

Form of Warrant to Purchase Common Stock (Swartz Private Equity, LLC) dated (1) February 24, 1999 exercisable to purchase common shares in connection with the offering of securities in Exhibit 4.14 incorporated by reference to Exhibit 4.16 to Form 10-QSB/A for the fiscal quarter ended November 30, 1998

4.17

Amended and Restated Investment Agreement dated July 12, 1999 by and between the (1) Company and Swartz Private Equity, LLC for a maximum aggregate amount of $5,000,000 incorporated by reference to Exhibit 4.17 to Pre-Effective Amendment No. 2 to Registration Statement on Form SB-2 dated July 14, 1999

4.18

Investment Agreement dated April 28, 2000 by and between the Company and Swartz (1) Private Equity, LLC for a maximum aggregate amount of $30,000,000 incorporated by reference to Exhibit 4.18 to Registration Statement on Form S-3 dated May 5, 2000

4.18.1

Waiver and Agreement dated September 24, 2001 amending the Investment Agreement (1) dated April 28, 2000 by and between the Company and Swartz Private Equity, LLC for a maximum aggregate amount of $30,000,000 incorporated by reference to Exhibit 4.18.1 to Registration Statement on Form S-1 dated October 11,2001

4.19

2001 Stock Option Plan of the Company dated February 21, 2001 incorporated by (1) reference to Exhibit 4.19 to Registration Statement on Form S-8 dated March 26, 2001

4.20

Investment agreement dated September 17, 2001 by and between the Company and (1) Swartz Private Equity, LLC for a maximum aggregate amount of $25,000,000 incorporated by reference to Exhibit 4.20 to Registration Statement on Form S-1 dated October 11, 2001

4.21

Registration Rights Agreement dated September 17, 2001 by and between the Company (1) and Swartz Private Equity, LLC related to the registration of the common stock related to Exhibit 4.20 incorporated by reference to Exhibit 4.21 to Registration Statement on Form S-1 dated October 11, 2001

4.22

Warrant to Purchase Common Stock dated September 17, 2001 exercisable to purchase (1) common shares in connection with the Offering of securities in Exhibit 4.20 incorporated by reference to Exhibit 4.22 to Registration Statement on Form S-1 dated October 11, 2001

4.23

Financial Consulting Services Agreement between the Company and M. Blaine Riley, (1) Randall Letcavage and Rosemary Nguyen incorporated by reference to Exhibit 4.23 to Registration Statement on Form S-8 dated January 22, 2002

4.24

Form of 8% Convertible Debenture (Lincoln Ventures, LLC) due June 10, 2004 (1) aggregating $1,000,000 to six investors incorporated by reference to Exhibit 4.24 to Registration Statement on Form S-3 dated June 27, 2002

4.25

Form of Stock Purchase Warrant (Lincoln Ventures, LLC) dated June 10, 2002 (1) exercisable to purchase an aggregate of 12,859,175 common shares at initial exercise prices ranging form $0.08616 to $0.10289 per share until June 10, 2007, granted to six investors in connection with the offering of securities described in Exhibit 4.24 incorporated by reference to Exhibit 4.25 to Registration Statement on Form S-3 dated June 27, 2002

4.26

Form of Registration Rights Agreement (Lincoln Ventures, LLC) dated June 10, 2002 (1) by and among the Company and six investors related to the registration of the common stock related to Exhibit 4.24 incorporated by reference to Exhibit 4.26 to Registration Statement on Form S-3 dated June 27,2002

4.27

2003 Stock Option Plan of the Company dated July 2, 2003 incorporated by reference (1) to Exhibit 4.27 to Registration Statement on Form S-8 dated September 4, 2003

4.28

Form of 8% Convertible Debenture, Stock Purchase Warrant, Registration Rights (2) Agreement and Securities Purchase Agreement for financings entered into between September 28, 2004 and January 17,2005

4.29

Non-Qualified Stock Option Agreement by and between Patriot Scientific Corporation and David H. Pohl, entered into as of June 5, 2006incorporated by reference (1) to Exhibit 10.2 to Form 8-K dated June 5,2006

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