Types of records I have worked with:
Bankruptcy records from all eras where records have been retained, from the 1870s through the 1990s. (I should note that all bankruptcy files in the National Archives holdings are stored in Kansas City.)
Civil case files
Criminal case files
Patent applications
Truman Library presidential records
Personal papers held within the Truman Library
Governmental forms and surveys
Notable cases that I have digitized:
The range of what's in the National Archives at Kansas City never stops surprising me. These are a few of the more remarkable things I've come across.
Original patent application for the Barbie doll, Record Group 241
Bright Tunes Music v. Harrisongs Music, Ltd, the copyright dispute between George Harrison and the Chiffons over "My Sweet Lord" and "He's So Fine," which runs to several thousand pages. If you've ever wanted to read what Harrison actually said under oath, it's here. Record Group 21
Since patents are uniquely visual, I also wanted to share some personal research— the patent application from 1887 to the pocket door mechanism that is in my own home, which gives precise instructions for adjustment: