Hammers

	PAT. NO.	Title
501	5,562,168	Impact hammer and driving tool
502	5,560,132	Automatic safety device for a revolver on the hammer
503	5,558,285	Apparatus for lifting and dropping a drop hammer
504	5,552,559	Keyboard musical instrument equipped with hammer sensors changing position between recording mode and silent mode
505	5,549,252	Water-hammer actuated crusher
506	5,549,031	Device for distributing oil under pressure and hydraulic hammer provided with said device
507	5,542,484	Liquid reciprocating piston hammer drilling arrangement without cavitation
508	5,542,328	Piano hammer rail stop assembly
509	5,542,140	Scraper attachment for a hammer
510	5,540,275	Single impact rapping hammer system and method for cleaning tube units
511	D372,179	Machinist hammer
512	5,537,896	Nonmarring hammer
513	5,537,862	Quantitative method for evaluation of the state of piano hammer felt tonal regulation
514	5,526,719	Hammer
515	D370,609	Combined carrying case and hammer set
516	5,522,466	Vibration-damping structure for electric hammer
517	5,520,254	Fluid-actuated impact hammer
518	5,519,670	Water hammer driven cavitation chamber
519	D369,734	Hammer head
520	5,509,340	Method for adjustment of hammer let off on a keyboard musical instrument
521	5,507,441	Swinging hammer for a material reducing machine
522	5,505,390	Two stage hammer mill with particle separator
523	5,505,271	Power tools and hammer mechanisms therefor
524	5,503,409	Self-tightening hammer-drill chuck
525	5,497,839	Liquid-driven downhole hammer drill
526	5,494,115	Electric hammer drill
527	D367,416	End of sledge hammer handle
528	5,490,740	Ground stabilized transportable drop hammer
529	5,490,437	Hammer
530	D366,604	Novelty hammer
531	5,484,386	Hammer-like tool for relieving stiffness in the neck and shoulder
532	5,484,111	Hammers for hammer mills
533	5,483,861	Keyboard instrument equipped with durable hammer stopper for selectively producing acoustic sounds and synthesized sounds
534	5,480,263	Soil displacement hammer for replacing underground pipes
535	D365,739	Combined hammer head and wood file
536	5,476,467	Surgical hammer for driving K-wires
537	5,470,084	Hand drill, in particular hammer drill
538	5,467,322	Water hammer driven vibrator
539	5,466,884	Music synthesizer system and method for simulating response of resonant digital waveguide struck by felt covered hammer
540	5,465,912	Pulverizing and grinding hammer
541	5,465,771	Wood processing apparatus with impact hammer
542	5,465,770	Tree harvesting apparatus with impact hammer
543	5,463,829	Method of removing a hammer from a shotgun
544	5,458,205	Liquid driven hammer machine
545	5,458,118	Quantitative neural percussion hammer
546	5,456,324	Percussion hammer
547	D362,723	Combined acupressure and massage hammer
548	D362,709	Firearm hammer
549	5,447,205	Drill adjustment mechanism for a hammer drill
550	5,445,232	Hydraulic breaking hammer

1	Reciprocable impact hammer
2	Hammer drill
3	Slide hammer tool and method of removing a keeper ring
4	Coil strap with nails for use in a nail hammer
5	Keyboard musical instrument equipped with hammer stopper promptly driven for rotation by means of rigid link work
6	Keyboard musical instrument having hammer stopper changed between free position and blocking position through turn on horizontal plane
7	Percussive down-the-hole hammer and a drill bit therefor
8	Hammer-type stapler
9	Hammer handle
10	Hammer for muzzle loader rifle
11	Impact hammer and driving tool
12	Hammer mill
13	Hammer type soil excavating machine
14	Print hammer assembly for dot line printer
15	Scraper-hammer tool
16	Pneumatic hammer lift