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Dennis I. Spencer

Henderson, CO: #1 of 2 inventorsTop 50%

Colorado: #140 of 1,784 inventorsTop 8%

Overall (1994): #35,467 of 165,921Top 25%

2 Patents 1994

Issued Patents 1994

Showing 1–2 of 2 patents

Patent #	Title	Co-Inventors	Date
5310290	Protective structure for excavations	—	1994-05-10
5306103	Wheeled carriage assembly for trench shields	—	1994-04-26