| US 7,589,712 B2 | ||
| Keyboard with keys for moving cursor | ||
| Robert J. Crowley, 64 Puritan La., Sudbury, Mass. 01776 (US); and Donald N. Halgren, 35 Central St., Manchester, Mass. 01944 (US) | ||
| Filed on Dec. 06, 2004, as Appl. No. 11/5,168. | ||
| Application 10/011241 is a division of application No. 09/549080, filed on Apr. 15, 2000, granted, now 6,313,762. | ||
| Application 08/974356 is a division of application No. 08/564631, filed on Nov. 29, 1995, granted, now 5,691,716. | ||
| Application 11/005168 is a continuation of application No. 10/011241, filed on Nov. 05, 2001, abandoned. | ||
| Application 09/549080 is a continuation of application No. 08/974356, filed on Nov. 19, 1997, granted, now 6,052,071. | ||
| Application 08/564631 is a continuation in part of application No. 08/447116, filed on Aug. 18, 1995, granted, now 5,666,112. | ||
| Application 08/447116 is a continuation of application No. 08/098851, filed on Jul. 29, 1993, granted, now 5,459,461. | ||
| Prior Publication US 2005/0083215 A1, Apr. 21, 2005 | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. H03M 11/00 (2006.01); H03K 17/94 (2006.01) | ||
| U.S. Cl. 345—168 [345/156; 341/22] | 14 Claims |
| 1. A signal generator for sending information to a computer monitor, comprising:
a plurality of depressible keys for sending electrical signals to a processing circuit through an electrical circuit, said
plurality of depressible keys being formed of a flexible material having an upper surface and a lower surface, a pressurized
medium comprising at least a foam or a gas maintaining a pressure against said lower surface of said flexible material to
keep said signal generator inflated; and
a second electrical circuit arranged between at least two of said plurality of depressible keys on said signal generator,
to effect motion in a cursor on said monitor if said plurality of at least two of said keys are moved in a sideways direction.
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