"Users will insert the following correction in the appropriate place in their manuals." [standard FAA language for "OOOPS."]

Piper appears only as "The New Piper Co.," but indicates the original Piper Co was "founded by William T Piper in 1937." The next "significant historical event" shown is 1954 with their first all-metal twin, the Apache. You can still get service manuals for a couple of "Piper Cub" models, on CD-ROM, from Avantext. I can't tell from the model numbers given what "era" the manuals cover, but they appear to start with the "Super Cubs" that didn't come along until well into 50s.

John