Electro-Sensors Inc. Watch

from 10-K 3 pages Description of the Registrant’s Securities Registered Pursuant to Section 12 of the Securities Exchange Act of 1934

from 10-K 3 pages Description of the Registrant’s Securities Registered Pursuant to Section 12 of the Securities Exchange Act of 1934

from 10-K 1 page Specimen Common Stock Certificate

from 10-K 1 page Exibit 4.1 35

from 10-K 1 page Common Common 15986 Electro-Sensors, Inc. Incorporated Under the Laws of the State of Minnesota See Reverse Side for Certain Definitions This Certifies That Cusip 285233 10 2 Is the Owner of Full-Paid and Non-Assessable Shares of the Common Stock of the Par Value of Ten Cents Each of Electro-Sensors, Inc. Transferable Only on the Books of the Corporation by the Holder Hereof in Person or by Duly Authorized Attorney, Upon Surrender of This Certificate Properly Endorsed. This Certificate Is Not Valid Unless Countersigned by the Transfer Agent and Registrar. in Witness Whereof, the Said Corporation Has Caused This Certificate to Be Signed by Its Authorized Officers and to Be Sealed With the Seal of the Corporation. Dated: Secretary President

from 10-K 1 page Common Common 15986 Electro-Sensors, Inc. Incorporated Under the Laws of the State of Minnesota See Reverse Side for Certain Definitions This Certifies That Cusip 285233 10 2 Is the Owner of Full-Paid and Non-Assessable Shares of the Common Stock of the Par Value of Ten Cents Each of Electro-Sensors, Inc. Transferable Only on the Books of the Corporation by the Holder Hereof in Person or by Duly Authorized Attorney, Upon Surrender of This Certificate Properly Endorsed. This Certificate Is Not Valid Unless Countersigned by the Transfer Agent and Registrar. in Witness Whereof, the Said Corporation Has Caused This Certificate to Be Signed by Its Authorized Officers and to Be Sealed With the Seal of the Corporation. Dated: Secretary President 37