Patented March 15, 1927
If an object in your hands says PAT. MARCH 15, 1927, it may be one of these.
| Patent | Title | Inventor | Of |
|---|---|---|---|
| US 1,621,347 | PADLOCK | Heinrich Biemer | Berlin |
Three centuries of keeping things shut
If an object in your hands says PAT. MARCH 15, 1927, it may be one of these.
| Patent | Title | Inventor | Of |
|---|---|---|---|
| US 1,621,347 | PADLOCK | Heinrich Biemer | Berlin |