Korper, William; Official Gazette for Patents (US), 12 Jan 1921, p687;
| # | Angle | Facets | Notes |
|---|---|---|---|
| G1 | 90.00° | 64 1 2 3 4 5 6 7 8 9101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263 | |
| P1 | 44.00° | 2 61014182226303438424650545862 | |
| P2 | 41.00° | 64 8162432404856 |
| # | Angle | Facets | Notes |
|---|---|---|---|
| C1 | 39.17° | 214183034465062 | |
| C2 | 38.12° | 610222638425458 | |
| C3 | 35.00° | 412202836445260 | |
| C4 | 11.50° | 64163248 | |
| T | 0.00° | 64 |