Games – toys – and sports goods – Exercise equipment – Weight
Patent
1998-05-07
1999-05-11
Hyder, Philip S.
Games, toys, and sports goods
Exercise equipment
Weight
2102
Patent
active
D04096959
REFERENCES:
patent: D215057 (1969-08-01), Sun
patent: D299373 (1989-01-01), Parker et al.
patent: D354322 (1995-01-01), Vodhanel, Jr.
patent: D355007 (1995-01-01), Rojas et al.
patent: 4618142 (1986-10-01), Joseph, Jr.
patent: 4673179 (1987-06-01), Pengler
patent: 5137502 (1992-08-01), Anastasi
patent: 5692996 (1997-12-01), Widerman
Photographs of Scientific weightlifting plate.
Counsilman, James, "Using Isometric Isontonic and Intermediary Exercises", Indiana Physical Fitness Program and Equipment, Indiana University Foundation, 1964.
Brochure for Roberts weightlifting plates, 1967.
Frasco Scott J.
Rojas Michael D.
Hyder Philip S.
Iron Grip Barbell Company, Inc.
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