The online tool for teaching with documents, from the National Archives

What is Patent Number 808,897?

Focusing on Details: White Out/Black Out

All documents and text associated with this activity are printed below, followed by a worksheet for student responses.

Introduction

You will see a patent drawing for an invention with its name and inventor's name hidden. 
 
Quickly scan this document. What do you notice first?
 


Name:
Class:

Worksheet

What is Patent Number 808,897?

Focusing on Details: White Out/Black Out

Examine the documents included in this activity and write your response in the space provided.


  • Describe the document and the invention it depicts as if you were explaining it to someone who can’t see it.
  • Based on what you can see, what do you think is the purpose of this invention? List evidence from the document to explain your opinion.
After you have made a hypothesis, click "View Entire Document" to reveal the invention. 

Your Response



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Activity Element

Patent Drawing of Willis H. Carrier`s Apparatus for Treating Air

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Conclusion

What is Patent Number 808,897?

Focusing on Details: White Out/Black Out

  • How has this invention been used since the early 1900s? 
  • How has invention impacted the settlement and development of the Southwest?

  • What positive effects has this invention had?
  • What negative effects has this invention had? 


Your Response



Document

Patent Drawing of Willis H. Carrier's Apparatus for Treating Air

1/2/1906

Willis H. Carrier submitted this drawing of his apparatus for treating air with his patent application. Patent number 808897 was issued to the Buffalo Forge Company on January 2, 1906.
This primary source comes from the Records of the Patent and Trademark Office.
National Archives Identifier: 7268013
Full Citation: Patent Drawing of Willis H. Carrier's Apparatus for Treating Air; 1/2/1906; Patent 808897; 808897 - Apparatus for Treating Air - Willis H. Carrier; Selected Patent Files, 1840 - 2005; Records of the Patent and Trademark Office, ; National Archives at College Park, College Park, MD. [Online Version, https://www.docsteach.org/documents/document/patent-treating-air, April 19, 2024]


Patent Drawing of Willis H. Carrier's Apparatus for Treating Air

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