Dear Mr. Brooks,
Thank you for posting your request on History Hub!
We searched the National Archives Catalog and located Index to Technical Library Documents, ca. 1949 - ca. 1970 and the series Technical Reports and Related Documents, ca. 1949 - ca. 1970 in the Records of the Naval Ship Systems Command (Record Group 344) that contain some information about Sylvania Electric Products, Inc. These records have not been digitized. For access to and information about these and similar records, please contact the National Archives at College Park - Textual Reference (RDT2) at firstname.lastname@example.org.
We also located the series Project Vanguard Contract Case Files, 1955-1959 in the Records of the National Aeronautics and Space Administration (Record Group 255) and the series Research and Development Files, 1947-1969 in the Records of U.S. Air Force Commands, Activities, and Organizations (Record Group 342) that contain some records related to Sylvania. You may contact RDT2 for assistance with these non-digitized records, as well.
Due to the COVID-19 pandemic and pursuant to guidance received from the Office of Management and Budget (OMB), NARA has adjusted its normal operations to balance the need of completing its mission-critical work while also adhering to the recommended social distancing for the safety of NARA staff. As a result of this re-prioritization of activities, you may experience a delay in receiving an initial acknowledgement as well as a substantive response to your reference request from RDT2. We apologize for this inconvenience and appreciate your understanding and patience.
We hope this information is helpful, and best of luck with your research!