Method and apparatus to optimize an integrated circuit design using transistor folding Grant US-6968524-B2 United States of America 22 Nov 2005
2-dimensional placement with reliability constraints for VLSI design Grant US-6823500-B1 United States of America 23 Nov 2004
Polygon representation in an integrated circuit layout Grant US-6128767-A United States of America 03 Oct 2000
Method for generating transistor placement in an automatic cell layout design Grant US-5995734-A United States of America 30 Nov 1999