Mosaic ImmunoEngineering is a nanotechnology-based immunotherapy company developing therapeutics and vaccines to positively impact the lives of patients and their families.

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Message: Background info on PTSC

just for fun....something else to read all from various SEC filings posted on the PTSC website.

In February 1989, we completed our initial public offering under a

registration statement on Form S-18 under the Securities Act of 1933. This

offering raised gross proceeds of $50,000 and net proceeds of approximately

$28,640 upon the sale of 2,500,000 units at $.02 per unit. Each unit sold in the

public offering consisted of one common share and one Class A common stock

purchase warrant exercisable to acquire one share of common stock and one Class

B common stock purchase warrant. All Class A and Class B warrants have since

been exercised or have lapsed.

On August 10, 1989, we acquired our ground penetrating radar technology

from the inventor, Mr. Elwood G. Norris, our founder and previous Chairman. The

details of that acquisition and certain related agreements are described in more

detail in "Certain Transactions" below. A description of the ground penetrating

radar technology, certain information about the industry generally, and our

operational plans are discussed below under the caption "Business".

On May 12, 1992, we redomiciled ourselves from Colorado to Delaware by

merging into a wholly owned Delaware subsidiary, Patriot Scientific Corporation,

organized for that purpose. The reincorporation resulted in a reverse stock

split. Three shares of the Colorado corporation, par value $.00001, were

converted into one share of the Delaware corporation, par value $.00001. The

reincorporation also effected a change in our charter and bylaws and a name

change to Patriot Scientific Corporation.

In May 1993, we registered under the Securities Act of 1933 a total of

7,631,606 shares issuable upon the exercise of outstanding Class A and Class B

common stock purchase warrants. We received net proceeds of $3,343,915 upon the

exercise of those warrants and the issuance of 7,538,102 common shares. None of

such warrants remain outstanding.

Effective May 31, 1994, we entered into an asset purchase agreement and

plan of reorganization with nanoTronics Corporation located in Eagle Point,

Oregon and Helmut Falk. We issued a total of 10,000,000 restricted common shares

to nanoTronics to acquire certain microprocessor technology of nanoTronics. The

technology acquired, the ShBoom technology, is being used to develop a

sophisticated yet low cost microprocessor. 5,000,000 of the shares were issued

on a non-contingent basis, and the remaining 5,000,000 shares were subject to

the terms of an earnout escrow arrangement. Of the 5,000,000 escrowed shares:

o 2,000,000 shares had been released from escrow as of September

7, 1999,

o 1,500,000 shares are being held in escrow pending the outcome of

a lawsuit in which we and the successor to nanoTronics are

co-defendants, and

o another 1,500,000 shares were cancelled and returned to us.

Effective December 26, 1996, we acquired 96.9% of the outstanding shares

of Metacomp, Inc., a California corporation, from 56 shareholders in exchange

for the issuance of 1,272,068 shares of our common stock. Based on the closing

price of our common stock of $1.375 on the date of the acquisition, the price of

the acquisition was $1,749,094. This business combination was accounted for as a

pooling of interests. Sixteen persons who hold an aggregate of 1,059,574 shares issued

in the Metacomp acquisition, have agreed to a lock up arrangement limiting sales by

each holder to 5% of their shares epr month through December 1998.

The following table sets forth certain information with respect to the

Selling Security Holders for whom the Company is registering the Common Stock

for resale to the public, including: (i) beneficial ownership of common stock as

of the date of this prospectus, (ii) the principal amount of Notes owned by each

Selling Security Holder, (iii) the number of shares issuable upon conversion of

the Notes and accrued interest thereon, (iv) the number of shares issuable upon

exercise of Warrants, (v) the percentage of class owned (assuming the number of

shares were issued upon conversion); and (vi) the number of shares offered by

each Selling Security Holder (assuming the maximum number of shares were issued

upon conversion and exercise). The Company has no knowledge of the intentions of

any Selling Security Holder to actually sell any of the shares listed under the

columns "Shares Issuable Upon Conversion" or "Shares Issuable Upon Exercise of

Warrants." There are no material relationships between any of the Selling

Security Holders and the Company other than as disclosed below. All such persons

have (or will have, upon the conversion or exercise of outstanding Notes or

Warrants) sole voting and investment power with respect to the shares being

offered.

Beneficial

Ownership of Shares Issuable

Common Principal Upon

Stock at Amount of Conversion of

Selling Prospectus Debenture Notes and

Security Holder Date (1) Owned Interest (2)

- ------------------------------ ---------------- ---------------- -----------------------

CC Investments, LDC - $1,850,000 4,070,000

The Matthew Fund, N.V. - 150,000 330,000

Swartz Family

Partnership, L.P. - - -

Kendrick Family

Partnership, L.P. - - -

Charles Krusen - - -

P. Bradford Hathorn - - -

John Harris - - -

Dunwoody Brokerage

Services - - -

Carlton M. Johnson - - -

Charles Whiteman - - -

- ------------------------------ ---------------- ---------------- -----------------------

Total - $2,000,000 4,400,000

============================== ================ ================ =======================

Shares Issuable Percent

Selling Upon Exercise Shares of

Security Holder of Warrants (3) Offered (4) Class (5)

- ------------------------------ ---------------------- ------------------ ------------

CC Investments, LDC 370,000 4,440,000 13.4%

The Matthew Fund, N.V. 30,000 360,000 1.1%

Swartz Family

Partnership, L.P. 76,500 76,500 *

Kendrick Family

Partnership, L.P. 76,500 76,500 *

Charles Krusen 24,648 24,648 *

P. Bradford Hathorn 10,000 10,000 *

John Harris 15,000 15,000 *

Dunwoody Brokerage

Services 2,500 2,500 *

Carlton M. Johnson 3,585 3,585 *

Charles Whiteman 3,000 3,000 *

- ------------------------------ ---------------------- ------------------ ------------

Total 611,733 5,011,733

============================== ====================== ================== ============

1) The number of Common Shares reported above as beneficially owned by each

Selling Shareholder is based solely on a review of a list of the Company's

shareholders prepared by the Company's transfer agent and registrar as of such

date.

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