1. Design
   

1. Mechanical 1
   

2. Mechanical 2
   

3. Mechanical 3
   

4. Mechanical 4
   

1. Electrical 1
   

2. Electrical 2
   

1. Bio-Chemical

Design Patent

1. US Patent No. D372,716
   

Mechanical Utility Patents

1. US Patent No. 5,505,635
   

2. US Patent No. 5,695,208
   

3. US Patent No. 5,720,593
   

4. US Patent No. 5,829,865
   

Electrical Utility Patents

1. US Patent No. 5,745,772
   

2. US Patent No. 5,825,711
   

Bio-Chemical Utility Patent

1. US Patent No. 5,516,650

(in PDF format)

(from Google Patent Database)