In 1608, Dutch eyeglass maker Hans Lipperhey filed the first patent for a working telescope. The patent was denied.
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| Number | Title | Issue Date |
| 7553263 | Calf extension weight training machine An exercise machine for exercising the calf muscles of a seated exerciser includes: a frame configured to rest on an underlying surface; a seat assembly mounted on the frame on which the exerciser sits; a movement arm pivotally interconnected with the frame forwardl... | 06/30/2009 |
| 7150702 | Leg curl/leg extension weight training machine An exercise machine for performing leg curl and leg extension movements includes: a frame configured to rest on an underlying surface; an upper leg-supporting assembly pivotally interconnected with the frame, the upper leg-supporting assembly having a seat pad; a to... | 12/19/2006 |
| 7052446 | Lat pulldown weight training machine An exercise machine for exercising muscles in the back of an exerciser, includes: a frame; a seat assembly attached to the frame; a movement arm pivotally attached to the frame and movable along a stroke path between an upper forward position and a lower rearward po... | 05/30/2006 |
| 7029427 | Weight training machine for exercising the upper chest muscles An exercise machine includes: a frame configured to rest on an underlying surface; a seat mounted to the frame; a backrest mounted to the frame above the seat, the seat and backrest being configured to receive a seated user; a pair of movement arm units pivotally in... | 04/18/2006 |
| 7004891 | Inclined leg press weight training machine An inclined leg press machine includes: a frame that includes a base configured to rest on an underlying surface and a pair of inclined guides; a seat assembly attached to the frame; a weight sled slidably engaged with the guides along a travel path that is substant... | 02/28/2006 |
| 7004890 | Leg press weight training machine A leg press exercise machine comprises: a frame; a seat unit attached to the frame; a press mechanism attached to the frame, the press mechanism including a foot panel and at least one swing link pivotally interconnected with the frame; a resistance-imparting unit o... | 02/28/2006 |
| 6913565 | Biceps curl machine An exercise machine includes: a frame resting on an underlying surface; a seat mounted to the frame and configured to receive a seated user; a pair of support pads mounted to the frame forwardly of and above the seat, each of the support pads positioned to engage on... | 07/05/2005 |
| 6910994 | Triceps extension machine An exercise machine includes: a frame configured to rest on an underlying surface; a seat mounted to the frame and configured to receive a seated user; a pair of support pads mounted to the frame forwardly of and above the seat, each of the support pads being positi... | 06/28/2005 |
| 6830542 | Rowing weight training machine A rowing weight training machine includes: a frame; a seat assembly attached to the frame; a movement arm pivotally attached to the frame and movable along a generally longitudinal stroke path between a forward position and a rearward position; a resistance-impartin... | 12/14/2004 |
| 6746378 | Lat pulldown weight training machine An exercise machine for exercising muscles in the back of an exerciser, includes: a frame; a seat assembly attached to the frame; a movement arm pivotally attached to the frame and movable along a stroke path between an upper forward position and a lower rearward po... | 06/08/2004 |