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    </link:definitionLink>
    <link:definitionLink xlink:type="extended" xlink:role="http://xpon/role/StockholdersEquityDetailsNarrative" xlink:title="00000049 - Disclosure - Stockholders&#8217; Equity (Details Narrative)" />
    <link:definitionLink xlink:type="extended" xlink:role="http://xpon/role/IncomeTaxesDetails" xlink:title="00000050 - Disclosure - Income Taxes (Details)" />
    <link:definitionLink xlink:type="extended" xlink:role="http://xpon/role/IncomeTaxesDetails1" xlink:title="00000051 - Disclosure - Income Taxes (Details 1)" />
    <link:definitionLink xlink:type="extended" xlink:role="http://xpon/role/IncomeTaxesDetails2" xlink:title="00000052 - Disclosure - Income Taxes (Details 2)" />
    <link:definitionLink xlink:type="extended" xlink:role="http://xpon/role/IncomeTaxesDetails3" xlink:title="00000053 - Disclosure - Income Taxes (Details 3)" />
    <link:definitionLink xlink:type="extended" xlink:role="http://xpon/role/RelatedPartyTransactionsDetailsNarrative" xlink:title="00000054 - Disclosure - Related Party Transactions (Details Narrative)" />
</link:linkbase>
