5,095,822
Cable Crossover Device

Andrew T. Martin
March 1992

---

5,749,137
Modular Loudspeaker Enclosure Suspension Rigging Method

Andrew T. Martin
May 1998

---

5,758,852
Modular Loudspeaker Enclosure Suspension Rigging System

Andrew T. Martin
June 1998

---

5,775,664
Anchor Fastening Device

Andrew T. Martin
July 1998

---

5,819,959
Modular Pivotal Suspension Rigging Apparatus

Andrew T. Martin
October 1998