No type or until time on my US visa stamp

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I am a Canadian filling out an US visa form. They ask for all previous US visas, except those for tourism. I have a few US stamps which have neither the visa type (B1/B2 etc) nor the until date. Where can I find them please?
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How do you read a visa stamp?
How to Read a US Visa StampHow do you know if your visa is approved us?
You can check the status of your visa application on ceac.state.gov. If your visa has been denied, you may find useful information on Ineligibilities and Waivers on usvisas.state.gov.What is a valid visa stamp?
A visa, or visa stamp, is a physical stamp or sticker in your passport that is issued by a U.S. embassy or consulate outside of the U.S. It indicates that you are eligible to apply for entry to the U.S. in a specific immigration category such as F-1 or J-1 student.What is amount valid until in US visa?
Visa Types and Application Fee Amounts This includes tourist, business, student, and exchange visas. Most petition-based visas, such as work and religious visas, are US$190. K visas cost US$265 and the fee amount for E visas is US$205 The tables below are a more comprehensive list of visa types and fee amounts.Five Mistakes NOT to Make at your Immigration Interview
Sources: Stack Exchange - This article follows the attribution requirements of Stack Exchange and is licensed under CC BY-SA 3.0.
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